A boy spent 5/6 of his money and had 100 naira left how much did he spend

2 answers

well, he spent 5 times as much as he had left, right?
The boy has X nairas.
X - 5x/6 = 100,
Multiply both sides by 6:
6x - 5x = 600,
X = 600,
(5/6) * 600 = 500 Nairas spent.