fractionsDecimals · Year 6 · AC9M6N07
Fraction of a collection
To find 3/4 of 20, draw a bar for the 20 and split it into 4 equal boxes. One box is 20 ÷ 4 = 5. Three boxes are 3 × 5 = 15. Divide by the denominator to find one part, then multiply by the numerator. If you know a part and need the whole, work backwards: find one box first, then all the boxes.
Sample questions
What is 1/3 of 9?
- There are 3 equal rows, so one row is 1/3 of the counters.
- 9 ÷ 3 = 3.
- 1/3 of 9 is 3.
Answer: 3
What is 1/3 of 18?
- There are 3 equal rows, so one row is 1/3 of the counters.
- 18 ÷ 3 = 6.
- 1/3 of 18 is 6.
Answer: 6
What is 1/4 of 20?
- There are 4 equal rows, so one row is 1/4 of the counters.
- 20 ÷ 4 = 5.
- 1/4 of 20 is 5.
Answer: 5