1.2.3

Conversion

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Converting Between Fractions and Terminating Decimals

Fraction into a decimal

Fraction into a decimal

To convert a fraction into a decimal divide the numerator by the denominator.
You may need to use long division and use a recurring symbol if needed.

$Terminating decimal to fraction$

Terminating decimal to fraction

To convert a terminating (not recurring) decimal into a fraction:
- Put the number after the decimal point on top and a power of ten on the bottom with as many zeros as there were decimal places.
Remember to cancel down fractions if possible.

Fractions and Percentages

A percentage is ‘parts per hundred’ and is written with a % sign which is called ‘percent’.

$Percent to fraction$

Percent to fraction

To convert between a percentage and a fraction write the number before the percent sign on the top and 100 on the bottom.
- 45% is 45 parts per 100 so is equivalent to the fraction $\frac{45}{100} = \frac{9}{20}$ .

Fraction to percent

Fraction to percent

To convert from a fraction to a percent multiply both the top and bottom lines of the fraction by the same amount so that the bottom line equals 100.
- $\frac{17}{20} = \frac{85}{100}$ = 85%

1

Numbers

1.1

Integers

1.1.1Integers 1.1.2Ordering Numbers 1.1.3The Four Rules of Operations 1.1.4Hierarchy of Operations 1.1.5Definitions & Terms 1.1.6HCF & LCM 1.1.7Standard Form 1.1.8Standard Form 2 1.1.9Prime Numbers 1.1.10End of Topic Test - Standard Form

1.2

Fractions

1.2.1Fractions 1.2.2Using Fractions 1.2.3Conversion 1.2.4Reciprocals

1.3

Decimals

1.3.1Decimals 1.3.2Decimals 2 1.3.3Exam-Style Questions - Recurring Decimals 1.3.4Comparing & Converting Decimals 1.3.5End of Topic Test - Fractions & Decimals

1.4

Powers & Roots

1.4.1Square Numbers 1.4.2Index Notation 1.4.3Exam-Style Questions - Index Notation 1.4.4Advanced Indices 1.4.5Surds 1.4.6End of Topic Test - Powers & Roots

1.5

Set Language & Notation

1.6

Percentages

1.6.1Percentages 1.6.2Percentage Change 1.6.3Percentages in Finance 1.6.4Compound Interest

1.7

Ratio & Proportion

1.7.1Manipulating Ratios 1.7.2Proportion

1.8

Degree of Accuracy

1.8.1Rounding & Significant Figures 1.8.2Estimation 1.8.3Upper & Lower Bounds 1.8.4Limits of Accuracy 1.8.5Limits of Accuracy 2 1.8.6End of Topic Test - Rounding & Estimation

2

Equations, Formulae & Identities

2.1

Algebraic Manipulation

2.1.1Algebra Basics 2.1.2Power Rules & Collecting Terms 2.1.3Expanding Brackets 2.1.4Expanding Brackets 2 2.1.5Factorising Quadratics 2.1.6Algebraic Fractions 2.1.7Proofs 2.1.8End of Topic Test - Algebra & Proofs 2.1.9Exam-Style Questions - Algebraic Proof

2.2

Expressions & Formulae

2.2.1Rearranging Formulae 2.2.2Simple Formulae 2.2.3End of Topic Test - Algebra Manipulation & Formula

2.3

Linear Equations

2.3.1Solving Linear Equations 2.3.2Simultaneous Linear Equations

2.4

Quadratic Equations

2.4.1Solving Quadratics 2.4.2Solving Quadratics 2 2.4.3End of Topic Test - Solving Equations 2.4.4Simulateous Quadratic Equations 2.4.5Exam-Style Questions - Simultaneous Equations 2.4.6Graphs of Simultaneous Equations 2.4.7End of Topic Test - Simultaneous Equations

2.5

Proportion

2.5.1Graphs & Proportion

2.6

Inequalities

2.6.1Solving Inequalities 2.6.2Graphs of Inequalities 2.6.3Exam-Style Questions - Inequalities 2.6.4End of Topic Test - Inequalities

3

Sequences, Functions & Graphs

3.1

Sequences

3.1.1Sequence Rules 3.1.2Finding Terms 3.1.3Exam-Style Questions - Sequences 3.1.4End of Topic Test - Sequences

3.2

Functions

3.2.1Functions 3.2.2Composite & Inverse 3.2.3End of Topic Test - Functions

3.3

Graphs

3.3.1Plotting Graphs 3.3.2Straight Line Graphs 3.3.3Properties of Graphs 3.3.4Quadratic Graphs 3.3.5Practical Graphs 3.3.6Graphs of Polynomials 3.3.7End of Topic Test Graphs

3.4

Common Graphs

3.4.1Graphs of Common Functions 3.4.2Transformations of Graphs 3.4.3End of Topic Test - Transformations and Graph

3.5

Calculus

3.5.1Derivatives of Functions 3.5.2Maxima & Minima

4

Geometry

4.1

Angles, Lines & Triangles

4.1.1Angles & Lines 4.1.2Angle Rules 4.1.3Angles in Triangles 4.1.4Exam-Style Questions - Angles

4.2

Polygons

4.2.1Polygons 4.2.2Quadrilaterals 4.2.3Congruence 4.2.4Scale Factor 4.2.5Exam-Style Questions - Enlargements 4.2.6End of Topic Test - Geometry

4.3

Symmetry

4.3.1Symmetry 4.3.2Exam-Style Questions - Reflection

4.4

Measures

4.4.1Measurements 4.4.2Time 4.4.3Bearings 4.4.4Speed

4.5

Circle Properties

4.5.1Properties of a Circle 4.5.2Circle Theorems 4.5.3Circle Theorems 2 4.5.4Circle Theorems 3 4.5.5Exam-Style Questions - Circle Theorems

4.6

Trigonometry & Pythagoras’ theorem

4.6.1Pythagoras' Theorem 4.6.2Trigonometry 4.6.3Sine & Cosine for Obtuse Angles 4.6.4Triangle Formulae 4.6.5Exam-Style Questions - Trigonometry & Area

4.7

Mensuration of 2D Shapes

4.7.1Standard Units 4.7.2Perimeter of 2D Shapes 4.7.3Area of 2D Shapes 4.7.4Area & Circumference of Circle 4.7.5End of Topic Test - Trigonometry & Shapes

4.8

3D Shapes & Volume

4.8.13D Shapes 4.8.2Surface Area 4.8.3Volume 4.8.4Exam-Style Questions - Volume

5

Vectors & Transformation Geometry

5.1

Vectors

5.1.1Vectors 5.1.2Vectors 2 5.1.3Exam-Style Questions - Vectors

5.2

Transformation Geometry

5.2.1Transformations 5.2.2Rotations 5.2.3Translations & Reflections 5.2.4Enlargements 5.2.5Effects of Transformations

6

Statistics & Probability

6.1

Statistical Measures

6.1.1Basic Statistics 6.1.2Frequency Table

6.2

Graphical Representation of Data

6.2.1Pictograms, Bar Charts & Pie Charts 6.2.2Histograms 6.2.3Cumulative Frequency 6.2.4Cumulative Frequency 2 6.2.5Exam-Style Questions - Cumulative Frequency 6.2.6End of Topic - Datasets

6.3

Probability

6.3.1Probability 6.3.2Theoretical Probability 6.3.3Experimental Probability 6.3.4Venn Diagrams 6.3.5Sample Space Diagrams 6.3.6Tree Diagrams 6.3.7Independent Events 6.3.8Conditional Probability 6.3.9End of Topic Test - Probability 6.3.10Exam-Style Questions - Probability

Jump to other topics

1

Numbers

1.1

Integers

1.1.1Integers 1.1.2Ordering Numbers 1.1.3The Four Rules of Operations 1.1.4Hierarchy of Operations 1.1.5Definitions & Terms 1.1.6HCF & LCM 1.1.7Standard Form 1.1.8Standard Form 2 1.1.9Prime Numbers 1.1.10End of Topic Test - Standard Form

1.2

Fractions

1.2.1Fractions 1.2.2Using Fractions 1.2.3Conversion 1.2.4Reciprocals

1.3

Decimals

1.3.1Decimals 1.3.2Decimals 2 1.3.3Exam-Style Questions - Recurring Decimals 1.3.4Comparing & Converting Decimals 1.3.5End of Topic Test - Fractions & Decimals

1.4

Powers & Roots

1.4.1Square Numbers 1.4.2Index Notation 1.4.3Exam-Style Questions - Index Notation 1.4.4Advanced Indices 1.4.5Surds 1.4.6End of Topic Test - Powers & Roots

1.5

Set Language & Notation

1.6

Percentages

1.6.1Percentages 1.6.2Percentage Change 1.6.3Percentages in Finance 1.6.4Compound Interest

1.7

Ratio & Proportion

1.7.1Manipulating Ratios 1.7.2Proportion

1.8

Degree of Accuracy

1.8.1Rounding & Significant Figures 1.8.2Estimation 1.8.3Upper & Lower Bounds 1.8.4Limits of Accuracy 1.8.5Limits of Accuracy 2 1.8.6End of Topic Test - Rounding & Estimation

2

Equations, Formulae & Identities

2.1

Algebraic Manipulation

2.1.1Algebra Basics 2.1.2Power Rules & Collecting Terms 2.1.3Expanding Brackets 2.1.4Expanding Brackets 2 2.1.5Factorising Quadratics 2.1.6Algebraic Fractions 2.1.7Proofs 2.1.8End of Topic Test - Algebra & Proofs 2.1.9Exam-Style Questions - Algebraic Proof

2.2

Expressions & Formulae

2.2.1Rearranging Formulae 2.2.2Simple Formulae 2.2.3End of Topic Test - Algebra Manipulation & Formula

2.3

Linear Equations

2.3.1Solving Linear Equations 2.3.2Simultaneous Linear Equations

2.4

Quadratic Equations

2.4.1Solving Quadratics 2.4.2Solving Quadratics 2 2.4.3End of Topic Test - Solving Equations 2.4.4Simulateous Quadratic Equations 2.4.5Exam-Style Questions - Simultaneous Equations 2.4.6Graphs of Simultaneous Equations 2.4.7End of Topic Test - Simultaneous Equations

2.5

Proportion

2.5.1Graphs & Proportion

2.6

Inequalities

2.6.1Solving Inequalities 2.6.2Graphs of Inequalities 2.6.3Exam-Style Questions - Inequalities 2.6.4End of Topic Test - Inequalities

3

Sequences, Functions & Graphs

3.1

Sequences

3.1.1Sequence Rules 3.1.2Finding Terms 3.1.3Exam-Style Questions - Sequences 3.1.4End of Topic Test - Sequences

3.2

Functions

3.2.1Functions 3.2.2Composite & Inverse 3.2.3End of Topic Test - Functions

3.3

Graphs

3.3.1Plotting Graphs 3.3.2Straight Line Graphs 3.3.3Properties of Graphs 3.3.4Quadratic Graphs 3.3.5Practical Graphs 3.3.6Graphs of Polynomials 3.3.7End of Topic Test Graphs

3.4

Common Graphs

3.4.1Graphs of Common Functions 3.4.2Transformations of Graphs 3.4.3End of Topic Test - Transformations and Graph

3.5

Calculus

3.5.1Derivatives of Functions 3.5.2Maxima & Minima

4

Geometry

4.1

Angles, Lines & Triangles

4.1.1Angles & Lines 4.1.2Angle Rules 4.1.3Angles in Triangles 4.1.4Exam-Style Questions - Angles

4.2

Polygons

4.2.1Polygons 4.2.2Quadrilaterals 4.2.3Congruence 4.2.4Scale Factor 4.2.5Exam-Style Questions - Enlargements 4.2.6End of Topic Test - Geometry

4.3

Symmetry

4.3.1Symmetry 4.3.2Exam-Style Questions - Reflection

4.4

Measures

4.4.1Measurements 4.4.2Time 4.4.3Bearings 4.4.4Speed

4.5

Circle Properties

4.5.1Properties of a Circle 4.5.2Circle Theorems 4.5.3Circle Theorems 2 4.5.4Circle Theorems 3 4.5.5Exam-Style Questions - Circle Theorems

4.6

Trigonometry & Pythagoras’ theorem

4.6.1Pythagoras' Theorem 4.6.2Trigonometry 4.6.3Sine & Cosine for Obtuse Angles 4.6.4Triangle Formulae 4.6.5Exam-Style Questions - Trigonometry & Area

4.7

Mensuration of 2D Shapes

4.7.1Standard Units 4.7.2Perimeter of 2D Shapes 4.7.3Area of 2D Shapes 4.7.4Area & Circumference of Circle 4.7.5End of Topic Test - Trigonometry & Shapes

4.8

3D Shapes & Volume

4.8.13D Shapes 4.8.2Surface Area 4.8.3Volume 4.8.4Exam-Style Questions - Volume

5

Vectors & Transformation Geometry

5.1

Vectors

5.1.1Vectors 5.1.2Vectors 2 5.1.3Exam-Style Questions - Vectors

5.2

Transformation Geometry

5.2.1Transformations 5.2.2Rotations 5.2.3Translations & Reflections 5.2.4Enlargements 5.2.5Effects of Transformations

6

Statistics & Probability

6.1

Statistical Measures

6.1.1Basic Statistics 6.1.2Frequency Table

6.2

Graphical Representation of Data

6.2.1Pictograms, Bar Charts & Pie Charts 6.2.2Histograms 6.2.3Cumulative Frequency 6.2.4Cumulative Frequency 2 6.2.5Exam-Style Questions - Cumulative Frequency 6.2.6End of Topic - Datasets

6.3

Probability

6.3.1Probability 6.3.2Theoretical Probability 6.3.3Experimental Probability 6.3.4Venn Diagrams 6.3.5Sample Space Diagrams 6.3.6Tree Diagrams 6.3.7Independent Events 6.3.8Conditional Probability 6.3.9End of Topic Test - Probability 6.3.10Exam-Style Questions - Probability

Practice questions on Conversion

Can you answer these? Test yourself with free interactive practice on Seneca — used by over 10 million students.

1
What is <sup>1</sup>&frasl;<sub>2</sub> as a decimal?Multiple choice
2
What is <sup>1</sup>&frasl;<sub>3</sub> as a decimal?Multiple choice
3
What is <sup>2</sup>&frasl;<sub>3</sub> as a decimal?Multiple choice
4
What is <sup>1</sup>&frasl;<sub>3</sub> as a decimal?Multiple choice
5
How do we convert a percentage to a fraction?Multiple choice

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Using Fractions

Reciprocals