Kelly and Chris are moving into a new city. Both of them love books and thus packed several boxes with books. If Chris packed 60% of the total number of boxes, what was the ratio of the number of boxes Kelly packed to the number of boxes Chris packed?	Choose the correct choice from the following choices.
A) 4 / 3
B) 2 / 3
C) 1 / 3
D) 3 / 4
E) 1 / 4

Rationale: the ratio of the number of boxes kelly packed to the number of boxes chris packed = 40 / 60 = 2 / 3 answer : b
Answer: B