Answer is 3:4
Step-by-step explanation:
There are 12 makes and 16 total free throws.
The ratio of makes to total is 12:16. The order is important. We list the makes first, then the total second.
Divide both parts of that ratio by the GCF 4
12:16 reduces to 3:4
It means for every 3 free throws made, the basketball player has attempted 4 free throws total.