Question

Can anyone help me solve number 3?​

Answer 1

let total salary equal to 1
then
$(1 - (1 \div 3)) = 2 \div 3$
again 2÷5 spend for food

so the remaing part will b
=.
$(2 \div 3) - (2 \div 5) = (10 - 6) \div (5 \times 3)$
$= (4 \div 15)$