How do you find what percentage discount you got?

Subtract the sale price from the original price to get the savings. Then divide savings by the original price and multiply by 100. Example: original $80, sale $64. Savings = $16. Discount % = ($16 ÷ $80) × 100 = 20%.

20% off $50 is $10 off. The sale price is $40. To calculate: $50 × 0.20 = $10 discount. $50 - $10 = $40 final price.

How do you calculate double discounts (discount on a discount)?

Apply the first discount to get an intermediate price, then apply the second discount to that intermediate price. A 20% discount followed by an additional 10% discount is not the same as 30% off. Example: $100 minus 20% = $80, then minus 10% = $72. The effective combined discount is 28%, not 30%.

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Quick Answer

For 20% off $80: multiply $80 × 0.20 = $16 saved. Sale price = $64. To find what % off you got: (savings ÷ original) × 100. Saved $16 on an $80 item = 20% off. Double discounts don't add — 20% off then 10% off equals 28% total, not 30%.

How to calculate a discount

To find the sale price after a percentage discount, multiply the original price by the discount percentage and subtract. For 30% off $120: $120 × 0.30 = $36. Sale price = $120 – $36 = $84. You can also multiply by (1 – discount %): $120 × 0.70 = $84.

Quick mental math tricks

For 10% off, move the decimal one place left ($150 → $15 off). For 20% off, find 10% and double it. For 25% off, divide by 4. For 50% off, divide by 2. For 15% off, find 10%, halve it for 5%, then add together.

Stacked and double discounts

When two discounts are applied in sequence — for example, 20% off and then an additional 10% off — they do not combine to 30%. Apply them one at a time. $100 → 20% off = $80 → 10% off $80 = $72. The combined effective discount is 28%. Retailers sometimes use stacked discounts to make a deal sound larger than it is.

Frequently asked questions

How do you calculate a percentage discount?

Multiply original price by the discount rate. 20% off $80: $80 × 0.20 = $16. Sale price = $80 – $16 = $64.

How do you find what % discount you got?

Divide savings by the original price and multiply by 100. Saved $16 on an $80 item: ($16 ÷ $80) × 100 = 20% off.

What is 20% off $50?

20% off $50 is a $10 discount. The sale price is $40.

Are double discounts the same as adding the percentages?

No. A 20% discount followed by an additional 10% off is 28% total, not 30%. Each discount applies to the already-reduced price.