Sumwise

What is 50% off 100?

50% off 100 = 50 (you save 50)

Sale price
50
You save
50
You pay
50%
Original
100

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 100 = 0.5 × 100 = 50
  2. Take it off the price: 100 − 50 = 50
  3. Check: Add the saving back: 50 + 50 = 100.

Another method. In one step: you pay 50% of the price, so 0.5 × 100 = 50. Both methods always give the same answer.

In a spreadsheet: =100*(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: 50 instead of 100, a saving of 50.

Shopping: an item marked $100 with 50% off costs $50 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 100

10% off 100 = 90 (you save 10)

15% off 100

15% off 100 = 85 (you save 15)

20% off 100

20% off 100 = 80 (you save 20)

25% off 100

25% off 100 = 75 (you save 25)

30% off 100

30% off 100 = 70 (you save 30)

40% off 100

40% off 100 = 60 (you save 40)

The other way round: 50% of 100. Two discounts do not add up: 50% off and then another 50% off leaves 25, not 0, because the second discount is taken of the lower price.

Practice

10% off 98
Show answer

10% off 98 = 88.2 (you save 9.8)

74% off 48
Show answer

74% off 48 = 12.48 (you save 35.52)

61% off 39
Show answer

61% off 39 = 15.21 (you save 23.79)

65% off 91
Show answer

65% off 91 = 31.85 (you save 59.15)

99% off 52
Show answer

99% off 52 = 0.52 (you save 51.48)

7% off 47
Show answer

7% off 47 = 43.71 (you save 3.29)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 50% off 100?

50% off 100 is 50: you save 50. Formula and steps for the sale price.

How much do I save with 50% off 100?

50. That is 50% of 100.

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

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