Answer
$\frac{3}{8} = \frac{unknown}{100}$
Part = 3
Whole= 8
Percent = unknown
Work Step by Step
$\frac{Part}{Whole} = \frac{Percent}{100}$
Now, The golfer lost three of this eight golf balls.
i.e. $\frac{3}{8} = \frac{unknown}{100}$