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 increase

Maths

Checking and securing understanding of percentage decrease

Percentage profit and loss

Simple and compound interest

Simple interest calculations

Simple interest calculations with technology

Compound interest calculations

Compound interest calculations with technology

Calculating compound interest rates

Changing compound interest rates

Advanced problem solving with percentages

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.

In this unit pupils will learn how to perform simple and compound interest calculations using percentages.

Percentages

is the increase when referencing something that is sold for more than the cost price given as a percentage of the original amount

is the decrease when referencing something that is sold for less than the cost price given as a percentage of the original amount

Interest is money added to savings or loans. Simple interest is always calculated on the original amount

Compound interest is the interest calculated on the original amount and the interest accumulated over the previous period.

The rate of interest is the percentage by which an amount increases

When a number is multiplied by itself multiple times, it can be written more simply in exponential form.

The rate of interest is the percentage by which an amount increases.

Simple interest is always calculated on the original amount.

Percentages

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