152 / 2 = 76

76

700 / 10 = 70

70 / 2 = 35

70 + 35 = 105

105

800 / 10 = 80

80 x 2 = 160


160

800 - 160 = 640

640

10% of £20.00 is £2.00

£2 x 6 = £12.00

12.00