If two things are proportional then the ratio of part to whole is maintained and the multiplicative relationship between parts is also maintained.

Checking and securing understanding of percentage decrease

Maths

The ratio unit will cover comparing fractions, percentages and ratios and being able to move fluently between them. This unit ensures pupils have had the opportunity to work with finding the percentage of an amount and the opportunity to calculate interest.

In the prior unit, pupils developed the skills to calculate a given percentage of an amount. In this unit, these skills are extended to performing simple and compound interest calculations.

Percentages

Which statement is the equivalent of "Decrease 50 by 20%"?

Which statement is the equivalent of "Increase 130 by 15%"?

Which statement is the equivalent of "Decrease 700 by 35%"?

This lesson will soon be taken down.

Checking and securing understanding of percentage decrease

Lesson outcome