Question

john spends 2/8 of his money on food, 1/5 of his money on fuel, and 2/10 of his money on clothes, Estimate what fraction of his money john has left. Explain

Answer 1

well, if John started out with "x" amount of money
then we subtract those fractions of "x" amount
so he's left with
`\bf x\quad -\quad \cfrac{2}{8}x-\cfrac{1}{5}x-\cfrac{2}{10}x\implies \cfrac{\boxed{?}}{\boxed{?}}x`