The following pie chart reflects the total percentage of marks of 5 boys in an exam. The total marks for these boys in this exam is 800. The marks of Rohit is how much percentage less than that of Raju ?

25%

Marks of Rohit = 15 % of 800

= \(\frac{3}{20}\) × 800 = 120

Marks of Raju = 20% of 200

= \(\frac{1}{5}\) × 800 = 160

Required percentage = \(\frac{160 - 120 }{160}\) × 100 

= \(\frac{1 }{4}\) × 100
= 25%