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 E?  Pick
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 = e answer : b"
Answer: B