Sumwise

What is 70% off 15?

70% off 15 = 4.5 (you save 10.5)

Sale price
4.5
You save
10.5
You pay
30%
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: 70% of 15 = 0.7 × 15 = 10.5
  2. Take it off the price: 15 − 10.5 = 4.5
  3. Check: Add the saving back: 4.5 + 10.5 = 15.

Another method. In one step: you pay 30% of the price, so 0.3 × 15 = 4.5. Both methods always give the same answer.

In a spreadsheet: =15*(1-70%). 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 70% off, you pay 30% of the price: 4.5 instead of 15, a saving of 10.5.

Shopping: an item marked $15 with 70% off costs $4.5 at the till, before any sales tax.

Stacked discounts

70% off followed by another 70% off is 91% off in total, not 100%: 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)

30% off 15

30% off 15 = 10.5 (you save 4.5)

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: 70% of 15. Two discounts do not add up: 70% off and then another 70% off leaves 1.35, not 0, because the second discount is taken of the lower price.

Practice

14% off 38
Show answer

14% off 38 = 32.68 (you save 5.32)

94% off 4
Show answer

94% off 4 = 0.24 (you save 3.76)

59% off 3
Show answer

59% off 3 = 1.23 (you save 1.77)

99% off 42
Show answer

99% off 42 = 0.42 (you save 41.58)

80% off 50
Show answer

80% off 50 = 10 (you save 40)

89% off 58
Show answer

89% off 58 = 6.38 (you save 51.62)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 70% off 15?

70% off 15 is 4.5: you save 10.5. Formula and steps for the sale price.

How much do I save with 70% off 15?

10.5. That is 70% of 15.

What was the price before 70% off if I paid 4.5?

15. Divide what you paid by 0.3, the share of the price that is left.