8.
Andrew earns £900 a month. He spends of this money on rent and on
4
5
computer games. What fraction of the £900 has he left?
To find the fraction of the £900 that Andrew has left, we need to subtract the amount he spends on rent and computer games from the total amount he earns.
Andrew spends 4/5 of £900 on rent and computer games, so we need to subtract this amount from the total amount.
4/5 * £900 = £(4/5) * £900 = £(4*900)/5 = £3600/5 = £720
So, Andrew has £720 left.
To find the fraction, we divide the amount Andrew has left by the total amount:
£720 / £900 = (720/900) = (8/10) = 4/5
Therefore, Andrew has 4/5 of the £900 left.