Sumwise

What is 20% off 40?

20% off 40 = 32 (you save 8)

Sale price
32
You save
8
You pay
80%
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: 20% of 40 = 0.2 × 40 = 8
  2. Take it off the price: 40 − 8 = 32
  3. Check: Add the saving back: 32 + 8 = 40.

Another method. In one step: you pay 80% of the price, so 0.8 × 40 = 32. Both methods always give the same answer.

In a spreadsheet: =40*(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: 32 instead of 40, a saving of 8.

Shopping: an item marked $40 with 20% off costs $32 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 40

10% off 40 = 36 (you save 4)

15% off 40

15% off 40 = 34 (you save 6)

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: 20% of 40. Two discounts do not add up: 20% off and then another 20% off leaves 25.6, not 24, because the second discount is taken of the lower price.

Practice

4% off 28
Show answer

4% off 28 = 26.88 (you save 1.12)

35% off 38
Show answer

35% off 38 = 24.7 (you save 13.3)

17% off 84
Show answer

17% off 84 = 69.72 (you save 14.28)

42% off 96
Show answer

42% off 96 = 55.68 (you save 40.32)

19% off 23
Show answer

19% off 23 = 18.63 (you save 4.37)

62% off 54
Show answer

62% off 54 = 20.52 (you save 33.48)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 20% off 40?

20% off 40 is 32: you save 8. Formula and steps for the sale price.

How much do I save with 20% off 40?

8. That is 20% of 40.

What was the price before 20% off if I paid 32?

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