GWD13套 第4套。Shouldn't the answer be D? since it certainly took a lager decrease in percentage to get the original number.  i found the current unofficial answer key to this Q  is B,any idea?

btw, if the question use the terms "x prcent more", "y percent less", does that mean x and y is absolutely positive?

Q29:

The annual rent collected by a corporation from a certain building was x percent more in 1998 than in 1997 and y percent less in 1999 than in 1998.  Was the annual rent collected by the corporation from the building more in 1999 than in 1997?

(1)     x > y

(2)    xy/100>x – y

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

98年比97年多x%，99年比98年少y%，问99比97如何

设97为1，则98是1+x/100，99是(1+x/100)*(1-y/100)=1+x/100-y/100-xy/10000

则只需求x/100-y/100+xy/10000 ? 0

则求100x-100y-xy  ?  0

(1) x>y, not sufficient

(2) xy/100>x-y  <==>  100x-100y-xy<0  suff.