Can anybody please help me with this question?

Question

Two friends are playing a version of proton golf where the hole is marked by a single proton. The first friend reads his meter, and declares he has a field strength of 27.5 N/C. The second friend looks at her meter and realizes she is three times as far away. What field strength does the second friend's meter read?
ANSWER ___________ N/C

Thank you

Answer 1

dies off as k/r^2
three times as far is 9 times as weak
27.5/9

Answer 2

divide by nine