1.2 Writing a decimal as a percentage

To turn a decimal back into a percentage you need to multiply by 100. A quick way to do this is to move the decimal point two places to the right.

As an example: .

Let’s take a closer look. ‘Per cent’ means ‘over 100,’ so 100 per cent is actually an equivalent way of expressing , which is the number 1. Multiplying by 100 per cent does not change the value of a number; it just makes it look different.