The difference between the value of a number increased by 12.5% and the value of the original number decreased by 25% is 30. What is the original number R?
Choose the correct option:	A) 60	B) 80	C) 40	D) 120	E) 160

Rationale: "( 1 + 1 / 8 ) x - ( 1 - 1 / 4 ) x = 30 ( 9 / 8 ) x - ( 3 / 4 ) x = 30 x = 80 = r answer : b"
Answer: B