When we are asked to find a percentage (or a fraction or a decimal amount) of a quantity, we can always interpret the word “of” as meaning we must multiply.

So if I want 30% of $90, I just need to do the calculation 30/100 x 90.

Example

Let’s try these together with our teacher:

Exercise

Let’s complete exercise 13B from pages 206 and 207:

The answers are below: