Question

Rohan and Pratap went for a picnic, their mother gave them a bottle that contained 5 litres of water.
Rohan consumed 2 5 of the water, Pratap consumed remaining water.
(a) How much water did Rohan drink ?
(b) What fraction of the total quantity of water did Pratap drink ?

Answer 1

Rohan consumed two fifth of the water:

a) Amount of water consumed by Rohan:

2/5 of the 5 liters =  2/5 x 5 liters

                          =  10/5 litres
 
                          = 2 liters.

b) what fraction of the total quantity of water did Pratap drink?

If Rohan drank 2 liters,  Then Pratap drank (5-2)liters  
                                                               = 3 liters

Therefore 3 liters as a fraction of 5 liters:

3litres/ 5 litres 

=  3/5