if the price of a book is first decreased by 20% and then increased by 20%, then the net change in the price will be :
Choose the correct choice from the following options:
A) 10
B) 388
C) 4
D) 29
E) 22

Rationale: "explanation : let the original price be rs . 100 . decreased by 20 % = 80 then increased 20 % on rs 80 = 80 + 16 = 96 net change in price = 100 - 96 = 4 answer : c"
Answer: C