Question

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

Answer 1

Let the apples he had originally be X
then
(100-40)% of X =420
60% of X =420
60/100 × X =420
60 X= 420×100
X= (420× 100)/60
X= 700
Originally he had 700 apples

Answer 2

Hola !

Apples with him = x

Total percentage of apples = 100 %

Apples sold [ percentage ] = 40 %

Hence , 
remaining apples' percentage = 100 - 40 = 60 %

Given ,

remaining apples = 420

60% of the total apples = 420 

60 % x = 420

60/100 x = 420

x = [ 420 x 100 ] / 60

x = 42000 / 60

x = 700

Originally he had 700 apples !!!