Sumwise

What is 30% off 40?

30% off 40 = 28 (you save 12)

Sale price
28
You save
12
You pay
70%
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: 30% of 40 = 0.3 × 40 = 12
  2. Take it off the price: 40 − 12 = 28
  3. Check: Add the saving back: 28 + 12 = 40.

Another method. In one step: you pay 70% of the price, so 0.7 × 40 = 28. Both methods always give the same answer.

In a spreadsheet: =40*(1-30%). 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 30% off, you pay 70% of the price: 28 instead of 40, a saving of 12.

Shopping: an item marked $40 with 30% off costs $28 at the till, before any sales tax.

Stacked discounts

30% off followed by another 30% off is 51% off in total, not 60%: 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)

20% off 40

20% off 40 = 32 (you save 8)

25% off 40

25% off 40 = 30 (you save 10)

40% off 40

40% off 40 = 24 (you save 16)

50% off 40

50% off 40 = 20 (you save 20)

The other way round: 30% of 40. Two discounts do not add up: 30% off and then another 30% off leaves 19.6, not 16, because the second discount is taken of the lower price.

Practice

6% off 22
Show answer

6% off 22 = 20.68 (you save 1.32)

67% off 18
Show answer

67% off 18 = 5.94 (you save 12.06)

65% off 15
Show answer

65% off 15 = 5.25 (you save 9.75)

62% off 42
Show answer

62% off 42 = 15.96 (you save 26.04)

40% off 96
Show answer

40% off 96 = 57.6 (you save 38.4)

15% off 57
Show answer

15% off 57 = 48.45 (you save 8.55)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 30% off 40?

30% off 40 is 28: you save 12. Formula and steps for the sale price.

How much do I save with 30% off 40?

12. That is 30% of 40.

What was the price before 30% off if I paid 28?

40. Divide what you paid by 0.7, the share of the price that is left.