Question

A one litre box of juice is three quarters full.you pour out one fifth of the litre of juice.how much of the litre of juice is now left in the box

Answer 1

$\frac{3}{4}-\frac{1}{5}=\frac{15}{20}-\frac{4}{20}=\frac{11}{20}$

Answer: 11/20 of the litre of juice is left in the box (it is 550 ml).