The process may be written as below:
- £16
- 7
- 40)112(£2 . 16s.
- 80
- 32
- 20
- 640
- 40
- 240
- 240
- 0
Suppose it required to take 13 parts out of a hundred from £56. 13. 7½.
- 56 . 13 . 7½
- 13
- 100) 736 . 17 . 1½ ( £7 . 7 . 4 ¼ ¹/₄₁
- 700
- 36 × 20 + 17 = 737
- 700
- 37 × 12 + 1 = 445
- 400
- 45 × 4 × 2 = 182
- 100
- 82
Let it be required to take 2½ parts out of a hundred from £3 12s. The result, by the same rule is
| £3 12s. × 2½ | , or 123 £3 12s. × | 5 | ; |
| 100 | 200 |
so that taking 2½ out of a hundred is the same as taking 5 parts out of 200.
EXERCISES.
Take 7⅓ parts out of 53 from £1 10s.
| Answer, 4s. 1 | 129 | d. |
| 159 |