Start by calculating the dollar amount of the discount by using the percent equation.
$ 169.15
Practice makes perfect
We want to find the sale price of the MP3 player. Let's start by calculating the dollar amount of the discount. We can do this by using the percent equation.
part = percent * whole
We are given that the regular price of the MP3 player is $ 199, and the discount is 15 %. Let d represent the dollar amount of the discount.
d = 15 % * $ 199Before solving the equation that we got, let's write the percent as a decimal. We can do this by ignoring the percent symbol and moving the decimal point two places to the left.
We got that 15 % is equal to 0.15.
d = 15 % * $ 199 [0.3em] ⇓ [0.3em]
d = 0.15 * $ 199
Finally, we will solve the equation for d. To keep things simple, let's ignore the dollar symbol for now.
We found that d = 29.85 is a solution to the equation. This means that the dollar amount of the discount is $ 29.85. Now we can calculate the sale price of the MP3 player by subtracting $ 29.85 from the regular price.
$ 199 - $ 29.85 = $ 169.15
The sale price of the MP3 player is $ 169.15.
