<span> 41.2 ft is the answer to your question hope this helps.</span>
You need to do 20 divide by 21 to get a decimal. Then if you multiply the decimal by hundred you should get the percentage.
Answer:

Step-by-step explanation:
To find the unit rate we need to divide the # of miles over the number of practices to get the # of miles ran in a single practice:
=
Hope this helps!