Answer: 15%
Step-by-step explanation: To find what percent of free throws the player misses we will have to write a percent equation.
For this situation the equation 17/20 = x/100 will work.
This means that if the player made 17 free throws out of 20, what percent did he make.
Solve for x.
17/20 = x/100
17/20 x 100 = x/100 x 100
1700/20 = x
85 = x
The basketball player made 85% of his free throws.
You want to find the percent of free throws he misses.
So you can simply subtract 100% from 85% to get 15%
The basketball player misses 15% of his free throws.