  # Find Percentages of Numbers, Quantities and Measurements

In this worksheet, students find percentages of numbers, quantities and measurements. Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Define, Interpret and Compare Percentages

Difficulty level:   #### Worksheet Overview

This worksheet is about finding percentages of numbers, quantities, and measurements.

It is easy to find 10% of any number because 10 % =
 10 100
=
 1 10

Simply divide by 10

So 10 % of 192 is 19.2

10 % of 54g is 5.4g etc.

 When you know 10% it is easy to find 1% (÷10 again). 5% (÷ 2). 30% (× 3).

and then you can add any combinations together.

 Example: Find 43% of 212 m 10% of 212m is 21.2 m 40% of 212m is 21.2 × 4 = 84.8 m 1% of 212m is 21.2 ÷ 10 = 2.12 m 3% of 212m is 2.12 × 3 = 6.36 m

43% of 212m = 40% + 3% = 84.8 + 6.36 = 91.16m

 You can work out percentages on a calculator either by using the % key, or by multiplying the number by the required percentage and dividing by 100.

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