Question 1

How do you calculate a discount?

Accepted Answer

Multiply the original price by the discount percentage divided by 100. Subtract from the original price. Example: $100 with 20% off = $100 - ($100 × 0.20) = $80.

Question 2

How to find the discount percentage?

Accepted Answer

Subtract the final price from the original, divide by the original price, and multiply by 100. Example: $100 to $75 = (100-75)/100 × 100 = 25% off.

Question 3

How to find the original price before discount?

Accepted Answer

Divide the final price by (1 - percentage/100). Example: $80 final with 20% off: $80 / (1 - 0.20) = $80 / 0.80 = $100 original.

Discount Calculator