Question

Out of his salary, Roan spends $\frac{1}{5}$ on rent, $\frac{1}{3}$ on food and $\frac{1}{6}$ on clothes fraction of his salary does he save?

Answer 1

let salary $=x.$

save fraction $=y.$

$\frac{1}{5}x+\frac{1}{3}x+\frac{1}{6}x+y=x$

$\frac{7}{10}x+y=x$

$y=x[1-\frac{7}{10}]=\frac{3x}{10}$

He saves $\frac{3}{10}$ of his salary.