Maths Skills for Science - Percentage & Equations
Science: KS3, topic 4.1.11
Maths Skills for Science - Percentage & Equations
When analysing your data, you will need various maths skills. Maths calculations will help you draw conclusions from your data. You can calculate percentages. You can also use equations.
Calculating a percentage
- To calculate the percentage, you must:
- Divide the actual amount by the possible total.
- After dividing, multiply the result by 100.
Percentage example
- If you scored 50 out of a 100 in a test, you can calculate the percentage of questions you have got right.
- In this example, divide 50 by 100.
- Multiply the total of the division by 100.
- The percentage in this example is 50%.
Rerranging an equation
- The basics of rearranging an equation lie in algebra.
- Try not to use equation triangles as they make advanced equations more complex.
Example equation
- An example of rearranging an equation is:
- If A = B x C, how can you calculate B?
- You can calculate B by putting numbers in place of the letters.
- A (10) = B (5) x C (2).
- In this case, 5 = 10 /2.
- By using numbers, you determine that B = A /C.
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Which of these can make equations more complex?