Sumwise

What is 15% off 20?

15% off 20 = 17 (you save 3)

Sale price
17
You save
3
You pay
85%
Original
20

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: 15% of 20 = 0.15 × 20 = 3
  2. Take it off the price: 20 − 3 = 17
  3. Check: Add the saving back: 17 + 3 = 20.

Another method. In one step: you pay 85% of the price, so 0.85 × 20 = 17. Both methods always give the same answer.

In a spreadsheet: =20*(1-15%). 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 15% off, you pay 85% of the price: 17 instead of 20, a saving of 3.

Shopping: an item marked $20 with 15% off costs $17 at the till, before any sales tax.

Stacked discounts

15% off followed by another 15% off is 27.75% off in total, not 30%: the second discount applies to the lower price.

Related results

Results for nearby numbers
10% off 20

10% off 20 = 18 (you save 2)

20% off 20

20% off 20 = 16 (you save 4)

25% off 20

25% off 20 = 15 (you save 5)

30% off 20

30% off 20 = 14 (you save 6)

40% off 20

40% off 20 = 12 (you save 8)

50% off 20

50% off 20 = 10 (you save 10)

The other way round: 15% of 20. Two discounts do not add up: 15% off and then another 15% off leaves 14.45, not 14, because the second discount is taken of the lower price.

Practice

3% off 61
Show answer

3% off 61 = 59.17 (you save 1.83)

83% off 84
Show answer

83% off 84 = 14.28 (you save 69.72)

10% off 7
Show answer

10% off 7 = 6.3 (you save 0.7)

73% off 2
Show answer

73% off 2 = 0.54 (you save 1.46)

69% off 47
Show answer

69% off 47 = 14.57 (you save 32.43)

79% off 88
Show answer

79% off 88 = 18.48 (you save 69.52)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 15% off 20?

15% off 20 is 17: you save 3. Formula and steps for the sale price.

How much do I save with 15% off 20?

3. That is 15% of 20.

What was the price before 15% off if I paid 17?

20. Divide what you paid by 0.85, the share of the price that is left.