How to Work Out a Discount and Final Price

Quick answer: A percentage discount reduces the original price by a specified fraction. You need two calculations: the discount amount and the final price.

Try it: Open the free BuzBolt Percentage Calculator. No signup is required.

Understand the method

Compute discount amount = original price × discount rate. Then subtract that amount from the original price. For a 15% discount, use the decimal rate 0.15.

Multiple discounts may be sequential rather than additive. Unless the offer says otherwise, applying 10% and then 20% is not the same as applying one 30% discount.

Worked example

A $240 item discounted by 25% has a $60 discount and a $180 final price before any additional charges or taxes.

What people often get wrong

Do not subtract 25 currency units when the promotion says 25%.

A practical way to use this

Check whether sales tax is calculated before or after discounts under the rules that apply to the transaction.

Frequently asked question

Is a 50% discount always half price? Yes, relative to the specified price base.

Show the discount amount and final price

For a $90 item discounted by 15%, calculate 90 × 0.15 = $13.50 off. Subtract that from the original price: $76.50. The discount percentage and the price after discount are different outputs.

Apply it to your own task

If several discounts apply one after another, they ordinarily apply to the new remaining price. A 10% reduction followed by another 10% reduction is not the same as a single 20% reduction.