Sumwise

What is 20% off 15?

20% off 15 = 12 (you save 3)

Sale price
12
You save
3
You pay
80%
Original
15

Sumwise · Maintained by Theo Abbott (pen name) · automated checks · Data: exact arithmetic; unit definitions from NIST SP 811 · Updated · How the checks work

How to work it out

  1. Work out the discount: 20% of 15 = 0.2 × 15 = 3
  2. Take it off the price: 15 − 3 = 12
  3. Check: Add the saving back: 12 + 3 = 15.

Another method. In one step: you pay 80% of the price, so 0.8 × 15 = 12. Both methods always give the same answer.

In a spreadsheet: =15*(1-20%). Taking the percentage of the price gives the saving, not the price you pay. Subtract it, or multiply by the share that is left.

What the result means

After 20% off, you pay 80% of the price: 12 instead of 15, a saving of 3.

Shopping: an item marked $15 with 20% off costs $12 at the till, before any sales tax.

Stacked discounts

20% off followed by another 20% off is 36% off in total, not 40%: the second discount applies to the lower price.

Related results

Results for nearby numbers
10% off 15

10% off 15 = 13.5 (you save 1.5)

15% off 15

15% off 15 = 12.75 (you save 2.25)

25% off 15

25% off 15 = 11.25 (you save 3.75)

30% off 15

30% off 15 = 10.5 (you save 4.5)

40% off 15

40% off 15 = 9 (you save 6)

50% off 15

50% off 15 = 7.5 (you save 7.5)

The other way round: 20% of 15. Two discounts do not add up: 20% off and then another 20% off leaves 9.6, not 9, because the second discount is taken of the lower price.

Practice

4% off 99
Show answer

4% off 99 = 95.04 (you save 3.96)

83% off 9
Show answer

83% off 9 = 1.53 (you save 7.47)

48% off 37
Show answer

48% off 37 = 19.24 (you save 17.76)

59% off 26
Show answer

59% off 26 = 10.66 (you save 15.34)

9% off 76
Show answer

9% off 76 = 69.16 (you save 6.84)

20% off 27
Show answer

20% off 27 = 21.6 (you save 5.4)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 20% off 15?

20% off 15 is 12: you save 3. Formula and steps for the sale price.

How much do I save with 20% off 15?

3. That is 20% of 15.

What was the price before 20% off if I paid 12?

15. Divide what you paid by 0.8, the share of the price that is left.