Sumwise

What is 15% off 30?

15% off 30 = 25.5 (you save 4.5)

Sale price
25.5
You save
4.5
You pay
85%
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: 15% of 30 = 0.15 × 30 = 4.5
  2. Take it off the price: 30 − 4.5 = 25.5
  3. Check: Add the saving back: 25.5 + 4.5 = 30.

Another method. In one step: you pay 85% of the price, so 0.85 × 30 = 25.5. Both methods always give the same answer.

In a spreadsheet: =30*(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: 25.5 instead of 30, a saving of 4.5.

Shopping: an item marked $30 with 15% off costs $25.5 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 30

10% off 30 = 27 (you save 3)

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)

40% off 30

40% off 30 = 18 (you save 12)

50% off 30

50% off 30 = 15 (you save 15)

The other way round: 15% of 30. Two discounts do not add up: 15% off and then another 15% off leaves 21.68, not 21, because the second discount is taken of the lower price.

Practice

3% off 70
Show answer

3% off 70 = 67.9 (you save 2.1)

35% off 24
Show answer

35% off 24 = 15.6 (you save 8.4)

99% off 40
Show answer

99% off 40 = 0.4 (you save 39.6)

67% off 51
Show answer

67% off 51 = 16.83 (you save 34.17)

23% off 34
Show answer

23% off 34 = 26.18 (you save 7.82)

62% off 7
Show answer

62% off 7 = 2.66 (you save 4.34)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 15% off 30?

15% off 30 is 25.5: you save 4.5. Formula and steps for the sale price.

How much do I save with 15% off 30?

4.5. That is 15% of 30.

What was the price before 15% off if I paid 25.5?

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