If the price of a book is first decreased by 25% and then increased by 20%, then the decrease in the price will be?  Select the correct option:	A) 20 %	B) 10 %	C) 25 %	D) 18 %	E) 30 %

Rationale: "let the original price be $ 100 new final price = 120 % of ( 75 % of $ 100 ) = 120 / 100 * 75 / 100 * 100 = $ 90 decrease is 10 % answer is b"
Answer: B