The manufacturing cost of a certain product consists of two parts - production cost and testing cost. In a year, the man

[Vincen]

The manufacturing cost of a certain product consists of two parts - production cost and testing cost. In a year, the manufacturing cost increased by 23%, whereas the production and testing costs increased by 25% and 20% respectively. Before the increase, the testing cost was what percentage of the production cost?

A. 25%
B. 33.33%
C. 50%
D. 66.67%
E. 125%

Answer: D

Source: e-GMAT