Answer: 16
Explanation:
The free throw average is 75%, wich means that from 100 attempted free throws, they make 75.
To solve the problem you can use a simple rule of three:
If for every 100 attempted free throws the knicks make 75 free throws, then how many attempts did they do if they made 12 free throws?

Then, if the knicks made 12 throws last night, that means they made 16 attempted throws.