Student: A 70 cm long wire is to be cut into two pieces so that one piece will be 2/5th of the other, how many centimeters will the shorter piece be?
Options:
(A) 20
(B) 99
(C) 88
(D) 77
(E) 66.
Another student: Let's say, hmmm...

1: 2/5 = 5: 2
2/7 * 70 = 20 Final answer: (B).