Sumwise

What is 10% off 15?

10% off 15 = 13.5 (you save 1.5)

Sale price
13.5
You save
1.5
You pay
90%
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: 10% of 15 = 0.1 × 15 = 1.5
  2. Take it off the price: 15 − 1.5 = 13.5
  3. Check: Add the saving back: 13.5 + 1.5 = 15.

Another method. In one step: you pay 90% of the price, so 0.9 × 15 = 13.5. Both methods always give the same answer.

In a spreadsheet: =15*(1-10%). 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 10% off, you pay 90% of the price: 13.5 instead of 15, a saving of 1.5.

Shopping: an item marked $15 with 10% off costs $13.5 at the till, before any sales tax.

Stacked discounts

10% off followed by another 10% off is 19% off in total, not 20%: the second discount applies to the lower price.

Related results

Results for nearby numbers
15% off 15

15% off 15 = 12.75 (you save 2.25)

20% off 15

20% off 15 = 12 (you save 3)

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: 10% of 15. Two discounts do not add up: 10% off and then another 10% off leaves 12.15, not 12, because the second discount is taken of the lower price.

Practice

3% off 13
Show answer

3% off 13 = 12.61 (you save 0.39)

19% off 60
Show answer

19% off 60 = 48.6 (you save 11.4)

31% off 86
Show answer

31% off 86 = 59.34 (you save 26.66)

23% off 76
Show answer

23% off 76 = 58.52 (you save 17.48)

52% off 77
Show answer

52% off 77 = 36.96 (you save 40.04)

38% off 52
Show answer

38% off 52 = 32.24 (you save 19.76)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 10% off 15?

10% off 15 is 13.5: you save 1.5. Formula and steps for the sale price.

How much do I save with 10% off 15?

1.5. That is 10% of 15.

What was the price before 10% off if I paid 13.5?

15. Divide what you paid by 0.9, the share of the price that is left.