Sumwise

What is 15% off 100?

15% off 100 = 85 (you save 15)

Sale price
85
You save
15
You pay
85%
Original
100

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 100 = 0.15 × 100 = 15
  2. Take it off the price: 100 − 15 = 85
  3. Check: Add the saving back: 85 + 15 = 100.

Another method. In one step: you pay 85% of the price, so 0.85 × 100 = 85. Both methods always give the same answer.

In a spreadsheet: =100*(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: 85 instead of 100, a saving of 15.

Shopping: an item marked $100 with 15% off costs $85 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 100

10% off 100 = 90 (you save 10)

20% off 100

20% off 100 = 80 (you save 20)

25% off 100

25% off 100 = 75 (you save 25)

30% off 100

30% off 100 = 70 (you save 30)

40% off 100

40% off 100 = 60 (you save 40)

50% off 100

50% off 100 = 50 (you save 50)

The other way round: 15% of 100. Two discounts do not add up: 15% off and then another 15% off leaves 72.25, not 70, because the second discount is taken of the lower price.

Practice

4% off 77
Show answer

4% off 77 = 73.92 (you save 3.08)

24% off 3
Show answer

24% off 3 = 2.28 (you save 0.72)

99% off 17
Show answer

99% off 17 = 0.17 (you save 16.83)

79% off 18
Show answer

79% off 18 = 3.78 (you save 14.22)

45% off 17
Show answer

45% off 17 = 9.35 (you save 7.65)

67% off 71
Show answer

67% off 71 = 23.43 (you save 47.57)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 15% off 100?

15% off 100 is 85: you save 15. Formula and steps for the sale price.

How much do I save with 15% off 100?

15. That is 15% of 100.

What was the price before 15% off if I paid 85?

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