Sumwise

What is 15% off 40?

15% off 40 = 34 (you save 6)

Sale price
34
You save
6
You pay
85%
Original
40

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 40 = 0.15 × 40 = 6
  2. Take it off the price: 40 − 6 = 34
  3. Check: Add the saving back: 34 + 6 = 40.

Another method. In one step: you pay 85% of the price, so 0.85 × 40 = 34. Both methods always give the same answer.

In a spreadsheet: =40*(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: 34 instead of 40, a saving of 6.

Shopping: an item marked $40 with 15% off costs $34 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 40

10% off 40 = 36 (you save 4)

20% off 40

20% off 40 = 32 (you save 8)

25% off 40

25% off 40 = 30 (you save 10)

30% off 40

30% off 40 = 28 (you save 12)

40% off 40

40% off 40 = 24 (you save 16)

50% off 40

50% off 40 = 20 (you save 20)

The other way round: 15% of 40. Two discounts do not add up: 15% off and then another 15% off leaves 28.9, not 28, because the second discount is taken of the lower price.

Practice

4% off 92
Show answer

4% off 92 = 88.32 (you save 3.68)

91% off 56
Show answer

91% off 56 = 5.04 (you save 50.96)

49% off 37
Show answer

49% off 37 = 18.87 (you save 18.13)

49% off 45
Show answer

49% off 45 = 22.95 (you save 22.05)

25% off 43
Show answer

25% off 43 = 32.25 (you save 10.75)

96% off 35
Show answer

96% off 35 = 1.4 (you save 33.6)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 15% off 40?

15% off 40 is 34: you save 6. Formula and steps for the sale price.

How much do I save with 15% off 40?

6. That is 15% of 40.

What was the price before 15% off if I paid 34?

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