Start by calculating the dollar amount of the discount by using the percent equation.
$ 1080
Practice makes perfect
We want to find the sale price of the TV. 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 TV is $ 1200, and the discount is 10 %. Let d represent the dollar amount of the discount.
d = 10 % * $ 1200Before 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 10 % is equal to 0.10 or 0.1.
d = 10 % * $ 1200 [0.3em] ⇓ [0.3em]
d = 0.1 * $ 1200
Finally, we will solve the equation for d. To keep things simple, let's ignore the dollar symbol for now.
We found that d = 120 is a solution to the equation. This means that the dollar amount of the discount is $ 120. Now we can calculate the sale price of the TV by subtracting $ 120 from the regular price.
$ 1200 - $ 120 = $ 1080
The sale price of the TV is $ 1080.
