Sumwise

What is 10% off 30?

10% off 30 = 27 (you save 3)

Sale price
27
You save
3
You pay
90%
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: 10% of 30 = 0.1 × 30 = 3
  2. Take it off the price: 30 − 3 = 27
  3. Check: Add the saving back: 27 + 3 = 30.

Another method. In one step: you pay 90% of the price, so 0.9 × 30 = 27. Both methods always give the same answer.

In a spreadsheet: =30*(1-10%). 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 10% off, you pay 90% of the price: 27 instead of 30, a saving of 3.

Shopping: an item marked $30 with 10% off costs $27 at the till, before any sales tax.

Stacked discounts

10% off followed by another 10% off is 19% off in total, not 20%: the second discount applies to the lower price.

Related results

Results for nearby numbers
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: 10% of 30. Two discounts do not add up: 10% off and then another 10% off leaves 24.3, not 24, because the second discount is taken of the lower price.

Practice

3% off 36
Show answer

3% off 36 = 34.92 (you save 1.08)

48% off 60
Show answer

48% off 60 = 31.2 (you save 28.8)

40% off 60
Show answer

40% off 60 = 36 (you save 24)

89% off 12
Show answer

89% off 12 = 1.32 (you save 10.68)

86% off 93
Show answer

86% off 93 = 13.02 (you save 79.98)

92% off 96
Show answer

92% off 96 = 7.68 (you save 88.32)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 10% off 30?

10% off 30 is 27: you save 3. Formula and steps for the sale price.

How much do I save with 10% off 30?

3. That is 10% of 30.

What was the price before 10% off if I paid 27?

30. Divide what you paid by 0.9, the share of the price that is left.