Question

Rahul spent 1 upon 3 of his salary on house rent and 1 by 6 of his salary on food he save the rest of his salary what fraction of salary does he save

Answer 1

$\frac{1}{3 } \: on \: rent \\ \frac{1}{6} \: \: on \: food$
let us consider as total salary as 1 therefore
$1 - \frac{1}{3} - \frac{1}{6 } = \frac{6 - 3}{6 } = \frac{3}{6} = \frac{1}{2}$