If y is 40 percent greater than x, then x is what percent less than y? Choose one:
A) 18%  B) 21%  C) 25%  D) 29%  E) 35%
y = 1.4x   x = y/1.4 = 10y/14 = y - (2/7)*y   2/7 is about 29%.   The answer is 29%.
<result>D</result>
If y is 40 percent greater than x, then x is what percent less than y?