Question

David ate 1/4 of a chocolate pie and peter ate 2/5.What fraction of the pie still remains?

Answer 1

Explanation:

Pie eaten by David and Peter = (1/4) + (2/5)

`= (1*5)/(4*5)+(2*4)/(5*4)\\\\=(5)/(20)+(4)/(20)\\\\=(9)/(20)`

Remaining pie = 11/20