Sumwise

What is 50% off 30?

50% off 30 = 15 (you save 15)

Sale price
15
You save
15
You pay
50%
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: 50% of 30 = 0.5 × 30 = 15
  2. Take it off the price: 30 − 15 = 15
  3. Check: Add the saving back: 15 + 15 = 30.

Another method. In one step: you pay 50% of the price, so 0.5 × 30 = 15. Both methods always give the same answer.

In a spreadsheet: =30*(1-50%). 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 50% off, you pay 50% of the price: 15 instead of 30, a saving of 15.

Shopping: an item marked $30 with 50% off costs $15 at the till, before any sales tax.

Stacked discounts

50% off followed by another 50% off is 75% 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)

The other way round: 50% of 30. Two discounts do not add up: 50% off and then another 50% off leaves 7.5, not 0, because the second discount is taken of the lower price.

Practice

10% off 51
Show answer

10% off 51 = 45.9 (you save 5.1)

62% off 49
Show answer

62% off 49 = 18.62 (you save 30.38)

73% off 50
Show answer

73% off 50 = 13.5 (you save 36.5)

2% off 25
Show answer

2% off 25 = 24.5 (you save 0.5)

71% off 88
Show answer

71% off 88 = 25.52 (you save 62.48)

60% off 66
Show answer

60% off 66 = 26.4 (you save 39.6)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 50% off 30?

50% off 30 is 15: you save 15. Formula and steps for the sale price.

How much do I save with 50% off 30?

15. That is 50% of 30.

What was the price before 50% off if I paid 15?

30. Divide what you paid by 0.5, the share of the price that is left.