Percentage - General Aptitude

Q1:

A fruit seller had some apples. He sells 40% apples and still has 420 apples. Originally, he had:

A 588 apples

B 600 apples

C 672 apples

D 700 apples

ANS:D - 700 apples

Suppose originally he had x apples. Then, (100 - 40)% of x = 420.

60 x = 420
100
 x = 420 x 100   = 700.
60