When 80% of a number is added to 80, the result is the same number. Find the number.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 400.
Let the number = x
⇒ 80% of x is 0.8x
So, 0.8x + 80 = x
⇒ 80 = x - 0.8x
⇒ 80 = 0.2x
⇒ x = 80 ÷ 0.2
⇒ x = 400