Ratios illustrated: dividing in a ratio and calculating the value of one part (or the whole) given the value of another part. GCSE Maths and Level 2 Maths.

1. Ratios and proportion

2. 3:2

3. 3:2 3 parts water

4. 3:2 2 parts orange juice 3 parts water

5. 3:2 2 parts orange juice 3 parts water 3 + 2 = 5 equal parts…

6. Find value of one share if you know the value of the whole amount…

7. £350 £??

8. £350 £?? How did you work it out?

9. £350 £70 350 ÷ 5 = 70

10. £350 £70 £70 £70

11. £350 £70 £70 £70 3  70 = 210

12. £350 £210

13. £350 £210 £??

14. Find value of one share if you know the value of the other share…

15. £20

16. £20 ??

17. £20 £30

18. £20 £30 How did you work it out?

19. Try these problems, some in pictures and some in words…

20. Jim’s Jemima’s Write down the ratio using the colon notation…

21. £800 Jim’s Jemima’s Find the value of Jim and Jemima’s shares…

22. £?? £280 Find the value of the whole amount and the missing share… £??

23. Write down the ratio using the smallest whole numbers you can…

24. How much cous-cous and water do you need for two servings?

25. Write the ratio of (dry) cous-cous to water in its lowest terms

26. Algernon wants to make 800g of cooked cous-cous. How much dry cous-cous does he need? And how much water in ml?