Students learn about calculating a percentage change using a decimal multiplier. Learning progresses from finding a simple percentage increase to solving financial maths problems with interest and depreciation.

The start of the lesson recaps how to find a percentage of an amount without a calculator. The plenary challenges students to compare three deals each of which involves a proportion change.

**Differentiated Learning Objectives**

- All students should be able to calculate a percentage increase using a multiplier.
- Most students should be able to calculate a percentage increase and decrease using a multiplier.
- Some students should be able to calculate a repeated percentage increase and decrease using a multiplier.