#### Explanation:

There are 3 different ways to decrease a number by a given percent. Choose the method you find easiest to understand.

1. Find 15% and subtract it from the regular price.

$\frac{15}{100} \times \frac{75}{1} \text{ } \rightarrow \frac{15}{\cancel{100}} ^ 4 \times {\cancel{75}}^{3} / 1$

=$11.25" " this is the amount taken off. Sale price = $75-$11.25 =$63.75

2. Find 85% of the regular price.

If 15% is taken off the regular price, the remaining amount is 85%

$\frac{85}{100} \times \frac{75}{1}$

=$63.75 3. Write the amounts as direct proportion "If$75 is 100%, how much will 85% be"?

$\frac{75}{100} = \frac{x}{85} \text{ } \leftarrow$ now cross-multiply

$x = \frac{75 \times 85}{100}$

x = \$63.75