One student scored 54 on a math test for which the mean score was 50.5 and the standard deviation was 3.2. Another student scored 80 on a chemistry test for which the mean score was 75.2 and the standard deviation was 5.2. Which student (math or chemistry) had a "better" score relatived to the rest of the test-takers?
Find both z-scores.
Formula:
z = (x - mean)/sd
Once you have both z-scores, compare the scores.
I hope this will help get you started.