In a certain school, the ratio of boys to girls is 5 to 13. If there are 128 more girls than boys, how many boys are there?
Select:
A) 27
B) 36
C) 45
D) 72
E) 80

Rationale: "the ratio of b to g is 5 : 13 and the other data point is g are more than boys by 128 . . . looking at the ratio we can say that the 8 ( 13 - 5 ) extra parts caused this diff of 128 . so 1 part corresponds to 128 / 8 = 16 and so 5 parts correspond to 5 * 16 = 80 . e"
Answer: E