If decreasing 70 by x% yields the same result as increasing 60 by x%, then x% of 91 is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 7.
70 − 0.7x = 60 + 0.6x
⇒ 10 = 1.3x ⇒ x = 100/13
x% of 91 = (100/13)% of 91 = 91/13 = 7