Simplify Ratio (Year 5)
Practise simplify ratio within Ratio & Proportion for Year 5, with worked examples and instant feedback.
The questions below are generated to match the National Curriculum for Year 5 and get harder as you progress from Rookie to Guru.
Worked examples
In a class there are 12 boys and 8 girls. Write the ratio of boys to girls in its simplest form.
- 12 : 8
- 3 : 2
- 2 : 3
- 6 : 4
Answer: 3 : 2. Divide both sides by the highest common factor of 12 and 8, which is 4. 12 ÷ 4 = 3, 8 ÷ 4 = 2, so the ratio is 3 : 2.
If the ratio of boys to girls is 2 : 3 and there are 10 boys, how many girls?
- 15
- 13
- 30
- 5
Answer: 15. Scale ×5.
Box A has 30 sweets in ratio 2 chocolate : 1 mint. Box B has 60 sweets in ratio 4 chocolate : 1 mint. Which box has the higher chocolate percentage?
- Box B (80% > 67%).
- Box A.
- Same.
- Cannot tell.
Answer: Box B (80% > 67%).. Compare fractions of total.
Related skills
Frequently asked questions
- What is simplify ratio?
- Practise simplify ratio within Ratio & Proportion for Year 5, with worked examples and instant feedback.
- How can my child practise simplify ratio at home?
- Work through the examples below, then start a free adaptive session. Northstar adjusts the difficulty automatically and tracks mastery over time.
Practise this adaptively
Start a free session that adjusts to your child's level, tracks mastery and celebrates progress.
Start free