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

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

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

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

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

6. 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.
Example 1.
Find 2/3 of £12
1/3 of 12 = 12  3 = 4
2 x 4 = £8
Example 2.
Find 3/4 of £20
1/4 of 20 = 20  4 = 5
3 x 5 = £15

7. 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.
Example 3.
Find 3/5 of 35 m
1/5 of 35 = 35  5 = 7
3 x 7 = 21 m
Example. 4
Find 5/6 of 54 kg
1/6 of 54 = 54  6 = 9
5 x 9 = 45 kg

8. 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.
Example 5.
Find 5/8 of 96 kg
1/8 of 96 = 96  8 = 12
5 x 12 = 60 kg
Example. 6
Find 4/9 of 81 mm
1/9 of 81 = 81  9 = 9
4 x 9 = 36 mm

9. 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.
Example 7.
Find 7/10 of 180 kg
1/10 of 180 = 180  10 = 18
7 x 18 = 136 kg
Example. 8
Find 7/15 of 105 mm
1/15 of 105 = 105  15 = 7
7 x 7 = 49 mm

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

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

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