Athletic race

Before a race, you start 4 5/8 feet behind your friend. At the halfway point, you are 3 2/3 feet ahead of your friend. What is the change in distance between you and your friend from the beginning of the race?

Correct result:

d =  8.2917 ft

Solution:

$d=3{\displaystyle \frac{2}{3}}+4{\displaystyle \frac{5}{8}}={\displaystyle \frac{199}{24}}=8{\displaystyle \frac{7}{24}}=8.2917\text{ ft}$

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