The Price of an article is cut by 10%. To restore it to the former value, the new price must be increased by_______?

A. 10 %
B. 9 1/11 %
C. 11 1/9 %
D. 11%

Let original price = Rs. 100

Then new price = Rs. 90

Increase on Rs. 90 = Rs. 10

Increase % = [10/90 X 100] % = 11 1/9 %