In 1986 the book value of a certain car was 2/3 of the original price, and in 1988 its book value was 1/2 of the original purchase price. By what percent did the book value for this car decrease from 1986 to 1988?  Choose the correct choice from the following.
A) 16 2/3 %	B) 25 %	C) 33 1/3 %	D) 50%	E) 75%
1986; 2/3   1988; 1/2   % decrease = change/original*100   2/3−1/2 / 2/3∗100   1/6∗3/2∗100=14∗100=25   Answer: "25 %"
<result>B</result>
In 1986 the book value of a certain car was 2/3 of the original price, and in 1988 its book value was 1/2 of the original purchase price. By what percent did the book value for this car decrease from 1986 to 1988?