Answer:
70%
Explanation:
To find the percent you put the part (70) out of the whole (100) and then multiply it by 100%. Like this:
= 70%
You can also look at it like this, it is already out of 100, so he made 70% of free throws because he made 70 free throws!
I hope this helps! Good luck and if you have any questions please let me know in the comments!