Pphalke

amy and joe are in the same senior class
amy is ranked 40th out of the 280 seniors and joe has a percentile rank of 15
of these two seniors which one is ranked higher?

From the given above, Joe's ranking means that there are 15% of the his classmates that is ranked higher than him. Solving this gives as,
                    Joe's ranking = (0.15) x (280) = 42
Hence, Joe ranked 42nd in senior's class. To answer the question above, Amy ranked higher than Joe.