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Fractions of Quantities

Example 1. Find 1/3 of £12. Example 2. Find 1/4 of £20. Fractions of Quantities. Unit Fractions. To calculate a unit fraction of a quantity, simply divide the quantity by the denominator. 1/3 of £12 = 12  3 = £4. 1/4 of £20 = 20  4 = £5. Example 3. Find 1/5 of 45 mm. Example 4.

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Fractions of Quantities

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  1. Example 1. Find 1/3 of £12 Example 2. Find 1/4 of £20 Fractions of Quantities Unit Fractions To calculate a unit fraction of a quantity, simply divide the quantity by the denominator. 1/3 of £12 = 12  3 = £4 1/4 of £20 = 20  4 = £5

  2. Example 3. Find 1/5 of 45 mm Example 4. Find 1/6 of 42 km Fractions of Quantities Unit Fractions To calculate a unit fraction of a quantity, simply divide the quantity by the denominator. 1/5 of 45 = 45  5 = 9 mm 1/6 of 42 = 42  6 = 7 km

  3. Example 5. Find 1/8 of 56 cm Example 6. Find 1/9 of £72 Fractions of Quantities Unit Fractions To calculate a unit fraction of a quantity, simply divide the quantity by the denominator. 1/8 of 56 = 56  8 = 7 cm 1/9 of 72 = 72  9 = £8

  4. Example 7. Find 1/10 of 90 kg Example 8. Find 1/15 of 75 g Fractions of Quantities Unit Fractions To calculate a unit fraction of a quantity, simply divide the quantity by the denominator. 1/10 of 90 = 90  10 = 9 kg 1/15 of 75 = 75  15 = 5 g

  5. 1 1 1 1 1 1 1 1 1 of $180 of £24 of 30 kg of 54 mm of 120 l of 60 cm of 40 km of £36 of 72 g 20 3 12 4 9 5 8 6 10 Fractions of Quantities Unit Fractions Calculate the fractions of the quantities shown. 1 2 3 £6 9 mm 6 kg 4 6 5 20 cm 12 l 5 km 7 9 8 £4 $9 6 g

  6. Example 1. Find 2/3 of £12 Example 2. Find 3/4 of £20 Fractions of Quantities General Fractions To calculate a general fraction of a quantity, simply divide the quantity by the denominator then multiply by the numerator. 1/3 of 12 = 12  3 = 4 2 x 4 = £8 1/4 of 20 = 20  4 = 5 3 x 5 = £15

  7. Example 3. Find 3/5 of 35 m Example. 4 Find 5/6 of 54 kg Fractions of Quantities General Fractions To calculate a general fraction of a quantity, simply divide the quantity by the denominator then multiply by the numerator. 1/5 of 35 = 35  5 = 7 3 x 7 = 21 m 1/6 of 54 = 54  6 = 9 5 x 9 = 45 kg

  8. Example 5. Find 5/8 of 96 kg Example. 6 Find 4/9 of 81 mm Fractions of Quantities General Fractions To calculate a general fraction of a quantity, simply divide the quantity by the denominator then multiply by the numerator. 1/8 of 96 = 96  8 = 12 5 x 12 = 60 kg 1/9 of 81 = 81  9 = 9 4 x 9 = 36 mm

  9. Example 7. Find 7/10 of 180 kg Example. 8 Find 7/15 of 105 mm Fractions of Quantities General Fractions To calculate a general fraction of a quantity, simply divide the quantity by the denominator then multiply by the numerator. 1/10 of 180 = 180  10 = 18 7 x 18 = 136 kg 1/15 of 105 = 105  15 = 7 7 x 7 = 49 mm

  10. 11 13 3 7 4 9 5 7 2 of $180 of £36 of 30 kg of 48 mm of 120 l of 90 cm of 56 km of £36 of 72 g 20 3 12 4 9 5 8 6 10 Fractions of Quantities General Fractions Calculate the fractions of the quantities shown. 1 2 3 £27 40 mm 24 kg 4 6 5 60 cm 108 l 49 km 7 9 8 £28 $117 66 g

  11. 1 1 1 1 1 1 1 1 1 of 72 g of £24 of $180 of 60 cm of 40 km of 54 mm of £36 of 30 kg of 120 l 20 10 8 4 3 6 12 9 5 Fractions of Quantities Unit Fractions Calculate the fractions of the quantities shown. 1 2 3 4 6 5 7 9 8

  12. 5 13 7 2 7 4 9 3 11 of 72 g of £36 of $180 of 90 cm of 56 km of 48 mm of £36 of 30 kg of 120 l 20 10 8 4 3 6 12 9 5 Fractions of Quantities General Fractions Calculate the fractions of the quantities shown. 1 2 3 4 6 5 7 9 8

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