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Ratios: find one part when you know the total

Year 6 maths · Fieldbook Learning

Name ______________________ Date __________

Add the parts of the ratio to find the number of equal parts in the whole, then work out one group.

  1. The ratio of hens to ducks is 3 : 2. There are 20 birds in all. How many ducks are there?
  2. The ratio of guitars to drums is 2 : 3. There are 15 instruments in all. How many guitars are there?
  3. The ratio of hens to ducks is 2 : 1. There are 15 birds in all. How many hens are there?
  4. The ratio of cats to dogs is 2 : 3. There are 10 pets in all. How many cats are there?
  5. The ratio of cars to bikes is 4 : 1. There are 20 vehicles in all. How many bikes are there?
  6. The ratio of tulips to daffodils is 5 : 2. There are 35 flowers in all. How many daffodils are there?
  7. The ratio of tulips to daffodils is 2 : 3. There are 40 flowers in all. How many tulips are there?
  8. The ratio of cars to bikes is 2 : 4. There are 24 vehicles in all. How many bikes are there?
  9. The ratio of pencils to pens is 3 : 6. There are 90 writing tools in all. How many pencils are there?
  10. The ratio of pencils to pens is 7 : 1. There are 64 writing tools in all. How many pencils are there?
  11. The ratio of hens to ducks is 4 : 6. There are 40 birds in all. How many hens are there?
  12. The ratio of boys to girls is 1 : 3. There are 28 students in all. How many girls are there?
  13. The ratio of hens to ducks is 9 : 8. There are 204 birds in all. How many ducks are there?
  14. The ratio of cats to dogs is 1 : 2. There are 18 pets in all. How many cats are there?
  15. The ratio of guitars to drums is 4 : 1. There are 50 instruments in all. How many guitars are there?
  16. The ratio of red marbles to blue marbles is 5 : 4. There are 90 marbles in all. How many red marbles are there?
  17. The ratio of cars to bikes is 9 : 2. There are 66 vehicles in all. How many cars are there?
  18. The ratio of cats to dogs is 8 : 3. There are 99 pets in all. How many cats are there?
  19. The ratio of cats to dogs is 6 : 5. There are 66 pets in all. How many cats are there?
  20. The ratio of red marbles to blue marbles is 6 : 1. There are 77 marbles in all. How many red marbles are there?
More free practice: fieldbooklearning.com/au/practice/year-6/ratios-find-a-part-from-the-total/

Play it as a quiz game

20 of these questions as multiple choice, with near-miss wrong answers, ready for Kahoot or Blooket.

  1. Download the game's own question template: in Kahoot, Add question → Import spreadsheet; in Blooket, Create a set → Spreadsheet import.
  2. Click the matching button below, then click the first empty question row of the template and paste.
  3. Save the template (Kahoot needs .xlsx, Blooket .csv) and upload it.
Download CSV

Answer key: Ratios: find one part when you know the total

  1. 8
  2. 6
  3. 10
  4. 4
  5. 4
  6. 10
  7. 16
  8. 16
  9. 30
  10. 56
  11. 16
  12. 21
  13. 96
  14. 6
  15. 40
  16. 50
  17. 54
  18. 72
  19. 36
  20. 66