Sumwise

What is 70% off 30?

70% off 30 = 9 (you save 21)

Sale price
9
You save
21
You pay
30%
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: 70% of 30 = 0.7 × 30 = 21
  2. Take it off the price: 30 − 21 = 9
  3. Check: Add the saving back: 9 + 21 = 30.

Another method. In one step: you pay 30% of the price, so 0.3 × 30 = 9. Both methods always give the same answer.

In a spreadsheet: =30*(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: 9 instead of 30, a saving of 21.

Shopping: an item marked $30 with 70% off costs $9 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 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)

40% off 30

40% off 30 = 18 (you save 12)

50% off 30

50% off 30 = 15 (you save 15)

The other way round: 70% of 30. Two discounts do not add up: 70% off and then another 70% off leaves 2.7, not 0, because the second discount is taken of the lower price.

Practice

14% off 16
Show answer

14% off 16 = 13.76 (you save 2.24)

64% off 5
Show answer

64% off 5 = 1.8 (you save 3.2)

74% off 27
Show answer

74% off 27 = 7.02 (you save 19.98)

13% off 71
Show answer

13% off 71 = 61.77 (you save 9.23)

59% off 34
Show answer

59% off 34 = 13.94 (you save 20.06)

41% off 88
Show answer

41% off 88 = 51.92 (you save 36.08)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 70% off 30?

70% off 30 is 9: you save 21. Formula and steps for the sale price.

How much do I save with 70% off 30?

21. That is 70% of 30.

What was the price before 70% off if I paid 9?

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