Sumwise

What is 50% off 40?

50% off 40 = 20 (you save 20)

Sale price
20
You save
20
You pay
50%
Original
40

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 40 = 0.5 × 40 = 20
  2. Take it off the price: 40 − 20 = 20
  3. Check: Add the saving back: 20 + 20 = 40.

Another method. In one step: you pay 50% of the price, so 0.5 × 40 = 20. Both methods always give the same answer.

In a spreadsheet: =40*(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: 20 instead of 40, a saving of 20.

Shopping: an item marked $40 with 50% off costs $20 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 40

10% off 40 = 36 (you save 4)

15% off 40

15% off 40 = 34 (you save 6)

20% off 40

20% off 40 = 32 (you save 8)

25% off 40

25% off 40 = 30 (you save 10)

30% off 40

30% off 40 = 28 (you save 12)

40% off 40

40% off 40 = 24 (you save 16)

The other way round: 50% of 40. Two discounts do not add up: 50% off and then another 50% off leaves 10, not 0, because the second discount is taken of the lower price.

Practice

10% off 91
Show answer

10% off 91 = 81.9 (you save 9.1)

84% off 52
Show answer

84% off 52 = 8.32 (you save 43.68)

95% off 49
Show answer

95% off 49 = 2.45 (you save 46.55)

91% off 49
Show answer

91% off 49 = 4.41 (you save 44.59)

7% off 29
Show answer

7% off 29 = 26.97 (you save 2.03)

86% off 44
Show answer

86% off 44 = 6.16 (you save 37.84)

Calculate another

How answers are calculated and checked: methodology.

Questions

What is 50% off 40?

50% off 40 is 20: you save 20. Formula and steps for the sale price.

How much do I save with 50% off 40?

20. That is 50% of 40.

What was the price before 50% off if I paid 20?

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