# Percentages and interest

### Term 2 starting in week 9 :: Estimated time: 2 weeks

• Convert and compare fractions, decimals and percentages (review)
• Work out percentages of amounts (with and without a calculator) (review)
• Increase and decrease by a given percentage (review)
• Express one number as a percentage of another (review)
• Calculate simple and compound interest
• Repeated percentage change
• Find the original value after a percentage change (review)
• Solve problems involving growth and decay
• Solve problems involving percentages, ratios and fractions

For higher-attaining pupils:

• Understand iterative processes

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## Lesson Starters

Here are some suggestions for whole-class, projectable resources which can be used at the beginnings of each lesson in this block.

### 1st Lesson

#### Fractions Decimals Percentages

Convert fractions to decimals, decimals to percentages and percentages to fractions.

### 2nd Lesson

#### High Interest

Finding a good personal loan requires an ability to calculate percentage and this page provides some practice.

### 3rd Lesson

#### Sid's Schemes

Work out which is the best scheme for Sid to choose for his summer bonus. One scheme involves a common misconception about percentages.

### 4th Lesson

#### Structured Settlement

Without a calculator match a a pie slice to a calculation to an answer.

### 5th Lesson

#### Estimating Percentages

Estimate the percentages of full circles and rectangles the sectors represent.

### 6th Lesson

#### Refreshing Revision

It is called Refreshing Revision because every time you refresh the page you get different revision questions.

Some of the Starters above are to reinforce concepts learnt, others are to introduce new ideas while others are on unrelated topics designed for retrieval practice or and opportunity to develop problem-solving skills.

White Rose Resources
 End of block assessments provide a quick progress check at the end of each block of learning to make sure students have understood the content covered. This Scheme of Learning was produced by White Rose Maths and is used here with permission granted on 30th June 2021.

For Students:

For All: