Percentage Increase & Decrease — Free KS3 Worksheet

Increasing or decreasing by a percentage is two steps if you do it the long way and one step if you do it the short way. The long way finds the change and then adds or subtracts it. The short way multiplies by a single number, so a twenty per cent rise is a multiply by 1.2 and a twenty per cent fall is a multiply by 0.8. Both are worth having, and this sheet practises both.

What is on the sheet

Increases first, with round percentages, using the find it then add it method. Then decreases the same way. Then the multiplier method on the same kinds of question, so the two can be compared directly. Later questions mix increases and decreases without labelling which is which. Word problems close it, with a coat in a sale, a weekly pay rise and a tip added to a restaurant bill.

Marking it

The percentage increase and decrease lesson derives the multiplier from the long method rather than presenting it as a separate trick.