if something costs $4 and is 80% off what was the original price

Question

if something costs $4 after it was 80 percent off what was the original price

Answer 1

Lets say that x is the original price of the item.

 

To get to 4 dollars we have to take 80% off.

 

so we multiply the original amount by 80% and subtract that from the original amount.

 

x - (.80)x = 4

 

now we can combine like terms and solve for x.

 

(.20)x = 4

 

x = 20

 

so the original price was $20