Sumwise

What is 40% off 30?

40% off 30 = 18 (you save 12)

Sale price
18
You save
12
You pay
60%
Original
30

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: 40% of 30 = 0.4 × 30 = 12
  2. Take it off the price: 30 − 12 = 18
  3. Check: Add the saving back: 18 + 12 = 30.

Another method. In one step: you pay 60% of the price, so 0.6 × 30 = 18. Both methods always give the same answer.

In a spreadsheet: =30*(1-40%). 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 40% off, you pay 60% of the price: 18 instead of 30, a saving of 12.

Shopping: an item marked $30 with 40% off costs $18 at the till, before any sales tax.

Stacked discounts

40% off followed by another 40% off is 64% off in total, not 80%: the second discount applies to the lower price.

Related results

Results for nearby numbers
10% off 30

10% off 30 = 27 (you save 3)

15% off 30

15% off 30 = 25.5 (you save 4.5)

20% off 30

20% off 30 = 24 (you save 6)

25% off 30

25% off 30 = 22.5 (you save 7.5)

30% off 30

30% off 30 = 21 (you save 9)

50% off 30

50% off 30 = 15 (you save 15)

The other way round: 40% of 30. Two discounts do not add up: 40% off and then another 40% off leaves 10.8, not 6, because the second discount is taken of the lower price.

Practice

8% off 99
Show answer

8% off 99 = 91.08 (you save 7.92)

19% off 22
Show answer

19% off 22 = 17.82 (you save 4.18)

7% off 86
Show answer

7% off 86 = 79.98 (you save 6.02)

21% off 85
Show answer

21% off 85 = 67.15 (you save 17.85)

88% off 25
Show answer

88% off 25 = 3 (you save 22)

61% off 83
Show answer

61% off 83 = 32.37 (you save 50.63)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 40% off 30?

40% off 30 is 18: you save 12. Formula and steps for the sale price.

How much do I save with 40% off 30?

12. That is 40% of 30.

What was the price before 40% off if I paid 18?

30. Divide what you paid by 0.6, the share of the price that is left.