When 12 is subtracted from a number, it reduces to 40%. Two-fifth of that number is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 8.
Let the number be x
According to the question
⇒ x - 12 = 40% of x
⇒ x - 12 = 40x/100
⇒ x - 12 = 0.4x
⇒ x - 0.4x = 12
⇒ 0.6x = 12
⇒ x = 12/0.6
⇒ x = 20
Now,
Two fifth of x = 2/5 × 20 = 8