if price of t.v set is reduced by 18%, then its sale increases by 88%, find net effect on sale value  Choices.
A) 44
B) 54
C) 46
D) 47
E) 48

Rationale: "- a + b + ( ( - a ) ( b ) / 100 ) = - 18 + 88 + ( - 18 * 88 ) / 100 = - 18 + 88 - 16 = 54 answer : b"
Answer: B