Question

if 2/5 of a man's income is paid as tax and 2/3 of what is spent on food and rent what portion of his income can he save ???

Answer 1

let his income is x rs
tax paid = 2x/5 rs
remaining is x-2x/5=3x/5 rs
on food n rent he paid
=2/3*(3x/5) rs=2x/5 rs
so total expenditure on these= (2x/5+2x/5)=4x/5 rs
so he can save x-4x/5 =x/5 rs
so he can save 1/5 of his income