Sumwise

What is 30% off 15?

30% off 15 = 10.5 (you save 4.5)

Sale price
10.5
You save
4.5
You pay
70%
Original
15

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 15 = 0.3 × 15 = 4.5
  2. Take it off the price: 15 − 4.5 = 10.5
  3. Check: Add the saving back: 10.5 + 4.5 = 15.

Another method. In one step: you pay 70% of the price, so 0.7 × 15 = 10.5. Both methods always give the same answer.

In a spreadsheet: =15*(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: 10.5 instead of 15, a saving of 4.5.

Shopping: an item marked $15 with 30% off costs $10.5 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 15

10% off 15 = 13.5 (you save 1.5)

15% off 15

15% off 15 = 12.75 (you save 2.25)

20% off 15

20% off 15 = 12 (you save 3)

25% off 15

25% off 15 = 11.25 (you save 3.75)

40% off 15

40% off 15 = 9 (you save 6)

50% off 15

50% off 15 = 7.5 (you save 7.5)

The other way round: 30% of 15. Two discounts do not add up: 30% off and then another 30% off leaves 7.35, not 6, because the second discount is taken of the lower price.

Practice

6% off 85
Show answer

6% off 85 = 79.9 (you save 5.1)

82% off 81
Show answer

82% off 81 = 14.58 (you save 66.42)

77% off 30
Show answer

77% off 30 = 6.9 (you save 23.1)

7% off 82
Show answer

7% off 82 = 76.26 (you save 5.74)

4% off 80
Show answer

4% off 80 = 76.8 (you save 3.2)

89% off 70
Show answer

89% off 70 = 7.7 (you save 62.3)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 30% off 15?

30% off 15 is 10.5: you save 4.5. Formula and steps for the sale price.

How much do I save with 30% off 15?

4.5. That is 30% of 15.

What was the price before 30% off if I paid 10.5?

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