A number, when 35 is subtracted from it, reduces to its 80 percent. What is four-fifth of that number?

A 70

B 90

C 120

D 140

Correct Answer: Option D

let, the number is x here, x-35=x-xX80/100 or,x=35 x 100/80 so ,four -fifth of the number is =35x100/80x4/5=140