Final answer:
The 70th percentile means that the student's score is higher than 70% of the students who took the test.
Step-by-step explanation:
The 70th percentile in the context of this situation means that 70% of the students scored below or equal to 16 on the math test. This suggests that the student's score of 16 is relatively high compared to other students. It indicates that the student performed better than 70% of the students who took the test.