1
fraction = 1/2 10p/20p = 1/2
7. If you allow for change, an infinite number of ways; eg 1 x 10p with 1 x 2p change or 1 x 10p with 2 x 1p change, etc.
10p/£2 = 10p/200p = 1/20
1 out of 20 of 200 pound is 10 pound! For it to be 10p it would have to be 1 out of 2000.
ten 10 x 10p = 100p = £1
1
fraction = 1/2 10p/20p = 1/2
100p = £1.00 → 1 million 10p pieces = 1,000,000 x 10p = 10,000,000p = 10,000,000 ÷ 100 pounds = £100,000
10p is 1/20th or 5% of £2.00
7. If you allow for change, an infinite number of ways; eg 1 x 10p with 1 x 2p change or 1 x 10p with 2 x 1p change, etc.
10p/£2 = 10p/200p = 1/20
1
It can be done in 162 ways, viz: 1 × 20p, 1 × 10p, 1 × 5p 1 × 20p, 1 × 10p, 2 × 2p, 1 × 1p 1 × 20p, 1 × 10p, 1 × 2p, 3 × 1p 1 × 20p, 1 × 10p, 5 × 1p 1 × 20p, 3 × 5p 1 × 20p, 2 × 5p, 2 × 2p, 1 × 1p 1 × 20p, 2 × 5p, 1 × 2p, 3 × 1p 1 × 20p, 2 × 5p, 5 × 1p 1 × 20p, 1 × 5p, 5 × 2p 1 × 20p, 1 × 5p, 4 × 2p, 2 × 1p 1 × 20p, 1 × 5p, 3 × 2p, 4 × 1p 1 × 20p, 1 × 5p, 2 × 2p, 6 × 1p 1 × 20p, 1 × 5p, 1 × 2p, 8 × 1p 1 × 20p, 1 × 5p, 10 × 1p 1 × 20p, 7 × 2p, 1 × 1p 1 × 20p, 6 × 2p, 3 × 1p 1 × 20p, 5 × 2p, 5 × 1p 1 × 20p, 4 × 2p, 7 × 1p 1 × 20p, 3 × 2p, 9 × 1p 1 × 20p, 2 × 2p, 11 × 1p 1 × 20p, 1 × 2p, 13 × 1p 1 × 20p, 15 × 1p 3 × 10p, 1 × 5p 3 × 10p, 2 × 2p, 1 × 1p 3 × 10p, 1 × 2p, 3 × 1p 3 × 10p, 5 × 1p 2 × 10p, 3 × 5p 2 × 10p, 2 × 5p, 2 × 2p, 1 × 1p 2 × 10p, 2 × 5p, 1 × 2p, 3 × 1p 2 × 10p, 2 × 5p, 5 × 1p 2 × 10p, 1 × 5p, 5 × 2p 2 × 10p, 1 × 5p, 4 × 2p, 2 × 1p 2 × 10p, 1 × 5p, 3 × 2p, 4 × 1p 2 × 10p, 1 × 5p, 2 × 2p, 6 × 1p 2 × 10p, 1 × 5p, 1 × 2p, 8 × 1p 2 × 10p, 1 × 5p, 10 × 1p 2 × 10p, 7 × 2p, 1 × 1p 2 × 10p, 6 × 2p, 3 × 1p 2 × 10p, 5 × 2p, 5 × 1p 2 × 10p, 4 × 2p, 7 × 1p 2 × 10p, 3 × 2p, 9 × 1p 2 × 10p, 2 × 2p, 11 × 1p 2 × 10p, 1 × 2p, 13 × 1p 2 × 10p, 15 × 1p 1 × 10p, 5 × 5p 1 × 10p, 4 × 5p, 2 × 2p, 1 × 1p 1 × 10p, 4 × 5p, 1 × 2p, 3 × 1p 1 × 10p, 4 × 5p, 5 × 1p 1 × 10p, 3 × 5p, 5 × 2p 1 × 10p, 3 × 5p, 4 × 2p, 2 × 1p 1 × 10p, 3 × 5p, 3 × 2p, 4 × 1p 1 × 10p, 3 × 5p, 2 × 2p, 6 × 1p 1 × 10p, 3 × 5p, 1 × 2p, 8 × 1p 1 × 10p, 3 × 5p, 10 × 1p 1 × 10p, 2 × 5p, 7 × 2p, 1 × 1p 1 × 10p, 2 × 5p, 6 × 2p, 3 × 1p 1 × 10p, 2 × 5p, 5 × 2p, 5 × 1p 1 × 10p, 2 × 5p, 4 × 2p, 7 × 1p 1 × 10p, 2 × 5p, 3 × 2p, 9 × 1p 1 × 10p, 2 × 5p, 2 × 2p, 11 × 1p 1 × 10p, 2 × 5p, 1 × 2p, 13 × 1p 1 × 10p, 2 × 5p, 15 × 1p 1 × 10p, 1 × 5p, 10 × 2p 1 × 10p, 1 × 5p, 9 × 2p, 2 × 1p 1 × 10p, 1 × 5p, 8 × 2p, 4 × 1p 1 × 10p, 1 × 5p, 7 × 2p, 6 × 1p 1 × 10p, 1 × 5p, 6 × 2p, 8 × 1p 1 × 10p, 1 × 5p, 5 × 2p, 10 × 1p 1 × 10p, 1 × 5p, 4 × 2p, 12 × 1p 1 × 10p, 1 × 5p, 3 × 2p, 14 × 1p 1 × 10p, 1 × 5p, 2 × 2p, 16 × 1p 1 × 10p, 1 × 5p, 1 × 2p, 18 × 1p 1 × 10p, 1 × 5p, 20 × 1p 1 × 10p, 12 × 2p, 1 × 1p 1 × 10p, 11 × 2p, 3 × 1p 1 × 10p, 10 × 2p, 5 × 1p 1 × 10p, 9 × 2p, 7 × 1p 1 × 10p, 8 × 2p, 9 × 1p 1 × 10p, 7 × 2p, 11 × 1p 1 × 10p, 6 × 2p, 13 × 1p 1 × 10p, 5 × 2p, 15 × 1p 1 × 10p, 4 × 2p, 17 × 1p 1 × 10p, 3 × 2p, 19 × 1p 1 × 10p, 2 × 2p, 21 × 1p 1 × 10p, 1 × 2p, 23 × 1p 1 × 10p, 25 × 1p 7 × 5p 6 × 5p, 2 × 2p, 1 × 1p 6 × 5p, 1 × 2p, 3 × 1p 6 × 5p, 5 × 1p 5 × 5p, 5 × 2p 5 × 5p, 4 × 2p, 2 × 1p 5 × 5p, 3 × 2p, 4 × 1p 5 × 5p, 2 × 2p, 6 × 1p 5 × 5p, 1 × 2p, 8 × 1p 5 × 5p, 10 × 1p 4 × 5p, 7 × 2p, 1 × 1p 4 × 5p, 6 × 2p, 3 × 1p 4 × 5p, 5 × 2p, 5 × 1p 4 × 5p, 4 × 2p, 7 × 1p 4 × 5p, 3 × 2p, 9 × 1p 4 × 5p, 2 × 2p, 11 × 1p 4 × 5p, 1 × 2p, 13 × 1p 4 × 5p, 15 × 1p 3 × 5p, 10 × 2p 3 × 5p, 9 × 2p, 2 × 1p 3 × 5p, 8 × 2p, 4 × 1p 3 × 5p, 7 × 2p, 6 × 1p 3 × 5p, 6 × 2p, 8 × 1p 3 × 5p, 5 × 2p, 10 × 1p 3 × 5p, 4 × 2p, 12 × 1p 3 × 5p, 3 × 2p, 14 × 1p 3 × 5p, 2 × 2p, 16 × 1p 3 × 5p, 1 × 2p, 18 × 1p 3 × 5p, 20 × 1p 2 × 5p, 12 × 2p, 1 × 1p 2 × 5p, 11 × 2p, 3 × 1p 2 × 5p, 10 × 2p, 5 × 1p 2 × 5p, 9 × 2p, 7 × 1p 2 × 5p, 8 × 2p, 9 × 1p 2 × 5p, 7 × 2p, 11 × 1p 2 × 5p, 6 × 2p, 13 × 1p 2 × 5p, 5 × 2p, 15 × 1p 2 × 5p, 4 × 2p, 17 × 1p 2 × 5p, 3 × 2p, 19 × 1p 2 × 5p, 2 × 2p, 21 × 1p 2 × 5p, 1 × 2p, 23 × 1p 2 × 5p, 25 × 1p 1 × 5p, 15 × 2p 1 × 5p, 14 × 2p, 2 × 1p 1 × 5p, 13 × 2p, 4 × 1p 1 × 5p, 12 × 2p, 6 × 1p 1 × 5p, 11 × 2p, 8 × 1p 1 × 5p, 10 × 2p, 10 × 1p 1 × 5p, 9 × 2p, 12 × 1p 1 × 5p, 8 × 2p, 14 × 1p 1 × 5p, 7 × 2p, 16 × 1p 1 × 5p, 6 × 2p, 18 × 1p 1 × 5p, 5 × 2p, 20 × 1p 1 × 5p, 4 × 2p, 22 × 1p 1 × 5p, 3 × 2p, 24 × 1p 1 × 5p, 2 × 2p, 26 × 1p 1 × 5p, 1 × 2p, 28 × 1p 1 × 5p, 30 × 1p 17 × 2p, 1 × 1p 16 × 2p, 3 × 1p 15 × 2p, 5 × 1p 14 × 2p, 7 × 1p 13 × 2p, 9 × 1p 12 × 2p, 11 × 1p 11 × 2p, 13 × 1p 10 × 2p, 15 × 1p 9 × 2p, 17 × 1p 8 × 2p, 19 × 1p 7 × 2p, 21 × 1p 6 × 2p, 23 × 1p 5 × 2p, 25 × 1p 4 × 2p, 27 × 1p 3 × 2p, 29 × 1p 2 × 2p, 31 × 1p 1 × 2p, 33 × 1p 35 × 1p
1 out of 20 of 200 pound is 10 pound! For it to be 10p it would have to be 1 out of 2000.
There are 3 30p's in £1. But you still have 10p left over needed to make the pound.
1/10