Answer:
$1080
Step-by-step explanation:
If it was 20% off, that means it was 1/5 off because 20% as a fraction is 1/5. Next, if it was 1/5 off that means that $864 represents 4/5 of the price. You can think of it like an equation, where [tex]\frac{4}{5} x = 864[/tex].
To solve this equation, you would first get rid of the fraction by multiplying both sides by 5:
[tex]\frac{4}{5} x * 5 = 864 * 5 --> 4x = 4320[/tex]
Next divide both sides of the equation by 4 to solve for x:
[tex]4x / 4 = 4320 / 4 --> x = 1080[/tex]
The regular price is $1080
You can also check this by doing 4/5 of 1080 = 864
