Sumwise

What is 50% off 80?

50% off 80 = 40 (you save 40)

Sale price
40
You save
40
You pay
50%
Original
80

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 80 = 0.5 × 80 = 40
  2. Take it off the price: 80 − 40 = 40
  3. Check: Add the saving back: 40 + 40 = 80.

Another method. In one step: you pay 50% of the price, so 0.5 × 80 = 40. Both methods always give the same answer.

In a spreadsheet: =80*(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: 40 instead of 80, a saving of 40.

Shopping: an item marked $80 with 50% off costs $40 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 80

10% off 80 = 72 (you save 8)

15% off 80

15% off 80 = 68 (you save 12)

20% off 80

20% off 80 = 64 (you save 16)

25% off 80

25% off 80 = 60 (you save 20)

30% off 80

30% off 80 = 56 (you save 24)

40% off 80

40% off 80 = 48 (you save 32)

The other way round: 50% of 80. Two discounts do not add up: 50% off and then another 50% off leaves 20, not 0, because the second discount is taken of the lower price.

Practice

10% off 30
Show answer

10% off 30 = 27 (you save 3)

84% off 3
Show answer

84% off 3 = 0.48 (you save 2.52)

35% off 41
Show answer

35% off 41 = 26.65 (you save 14.35)

32% off 32
Show answer

32% off 32 = 21.76 (you save 10.24)

43% off 4
Show answer

43% off 4 = 2.28 (you save 1.72)

85% off 76
Show answer

85% off 76 = 11.4 (you save 64.6)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 50% off 80?

50% off 80 is 40: you save 40. Formula and steps for the sale price.

How much do I save with 50% off 80?

40. That is 50% of 80.

What was the price before 50% off if I paid 40?

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