Question

Gentech reduce its delivery charge 20% in 2001. To bring back its delivery charge to its 2000 price, it will then raise its 2002 delivery charge by?

Answer 1

It has to raise the delivery charge by 25%.
Suppose the charge in 2000 be Rs.100/-.In 2001, it becomes Rs.80/-.To make it again as Rs.100/-, the charge in 2001 has to be increased as (20/80)*100, which gives 25%.