KS2 Maths reasoning (SATs) textbook
Chapter 3: Ratio and proportion reasoning
- Strand Ratio and proportion
- Level Year 6
- Practice 96 questions with step-by-step solutions
By the end of this chapter you will be able to
- Simplify a ratio and find a missing amount from a ratio
- Share an amount in a given ratio and write each share
- Use the unit method to scale a recipe or a rate
- Compare the price of one item to decide which is better value
- Find a scale factor and use it to find a missing length
You should already know
- Multiplication and division facts, and equivalent fractions (Year 4 and Year 5)
- Fractions of amounts and percentages (Chapter 2 of this book)
Where this leads
- Measures in context (Chapter 4 of this book)
Lessons in this chapter
- 3.1 Ratio language and simplifying ratios
- 3.2 Sharing in a ratio and fractions of a total
- 3.3 The unit method and percentages
- 3.4 Best value and fair comparisons
- 3.5 Similar shapes and scale factors
- Summary and key words
- Check-up and practice test questions
Read the whole chapter on one page (good for printing).
Practise with real exam questions
The DfE publishes every past KS2 test, with mark schemes, for free.