Ratios and proportion
3:2
3:2 3 parts  water
3:2 2 parts  orange juice 3 parts  water
3:2 2 parts  orange juice 3 parts  water 3 + 2 = 5  equal parts…
Find value of one share if you know the value of the whole amount…
£350 £??
£350 £?? How did  you  work it out?
£350 £70 350 ÷ 5 = 70
£350 £70 £70 £70
£350 £70 £70 £70 3    70 = 210
£350 £210
£350 £210 £??
Find value of one share if you know the value of the other share…
£20
£20 ??
£20 £30
£20 £30 How did  you  work it out?
Try these problems, some in pictures and some in words…
Jim’s Jemima’s Write down the ratio using the  colon notation…
£800 Jim’s Jemima’s Find the value of Jim  and Jemima’s shares…
£?? £280 Find the value of the whole amount and the missing share… £??
Write down the ratio using the smallest  whole numbers you can…
How much cous-cous and water do you need for two servings?
Write the ratio of (dry) cous-cous to water in its lowest terms
Algernon wants to make 800g of  cooked  cous-cous. How much  dry  cous-cous does he need? And how much water in ml?
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Ratios And Proportion

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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.

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Ratios And Proportion

  1. 1. Ratios and proportion
  2. 2. 3:2
  3. 3. 3:2 3 parts water
  4. 4. 3:2 2 parts orange juice 3 parts water
  5. 5. 3:2 2 parts orange juice 3 parts water 3 + 2 = 5 equal parts…
  6. 6. Find value of one share if you know the value of the whole amount…
  7. 7. £350 £??
  8. 8. £350 £?? How did you work it out?
  9. 9. £350 £70 350 ÷ 5 = 70
  10. 10. £350 £70 £70 £70
  11. 11. £350 £70 £70 £70 3  70 = 210
  12. 12. £350 £210
  13. 13. £350 £210 £??
  14. 14. Find value of one share if you know the value of the other share…
  15. 15. £20
  16. 16. £20 ??
  17. 17. £20 £30
  18. 18. £20 £30 How did you work it out?
  19. 19. Try these problems, some in pictures and some in words…
  20. 20. Jim’s Jemima’s Write down the ratio using the colon notation…
  21. 21. £800 Jim’s Jemima’s Find the value of Jim and Jemima’s shares…
  22. 22. £?? £280 Find the value of the whole amount and the missing share… £??
  23. 23. Write down the ratio using the smallest whole numbers you can…
  24. 24. How much cous-cous and water do you need for two servings?
  25. 25. Write the ratio of (dry) cous-cous to water in its lowest terms
  26. 26. Algernon wants to make 800g of cooked cous-cous. How much dry cous-cous does he need? And how much water in ml?

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