Answer
$p=10$%:
$C=25~dollars$
$p=40$%:
$C=150~dollars$
$p=75$%:
$C=675~dollars$
Work Step by Step
$p=10$%:
$C=\frac{225\times10}{100-10}=\frac{2250}{90}=25$
$p=40$%:
$C=\frac{225\times40}{100-40}=\frac{9000}{60}=150$
$p=75$%:
$C=\frac{225\times75}{100-75}=\frac{2250}{25}=675$
