Answer:
16
Explanation:
First we find out how many fittings he can check in one day:
960 fittings ÷ 15 days = 64 fittings
The rate is 64 fittings/day.
Now we find out how many he checks in a quarter of the day:
* 64 = 16
or if you want to write it another way
64 ÷ 4 = 16