Sumwise

Percentage Difference between 40 and 80

Between 40 and 80: 66.6667% difference

Difference
66.6667%
Gap
40
Average
60
Ratio
2 : 1

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. Gap between the values: |40 − 80| = 40
  2. Average of the values: (40 + 80) ÷ 2 = 60
  3. Divide the gap by the average and multiply by 100: 40 ÷ 60 × 100 = 66.6667%
  4. Check: Work backwards: 0.666667 × 60 = 40, the gap between the values.

In a spreadsheet: =ABS(40-80)/((40+80)/2)*100. Dividing by one of the values instead of their average turns it into a percentage change, which depends on which value you start from.

What the result means

80 is 40 more than 40. Measured against their average, 60, that gap is 66.6667%. The result is the same whichever value you name first.

Prices: if one shop charges $40 and another $80 for the same item, the prices differ by 66.6667%.

Why the average is the base

Dividing the gap of 40 by 40 gives 100%, and dividing it by 80 gives 50%. The average, 60, sits between them, so the result does not depend on which value is listed first.

Related results

Results for nearby numbers
40 and 90

Between 40 and 90: 76.9231% difference

40 and 70

Between 40 and 70: 54.5455% difference

50 and 80

Between 50 and 80: 46.1538% difference

30 and 80

Between 30 and 80: 90.9091% difference

The other way round: Percentage change from 40 to 80. Percentage difference is symmetric: between 80 and 40 it is the same 66.6667%, so there is one page for each pair of numbers. Percentage change is not: from 40 to 80 is +100%, from 80 to 40 is -50%.

Practice

8 and 54
Show answer

Between 8 and 54: 148.3871% difference

24 and 69
Show answer

Between 24 and 69: 96.7742% difference

76 and 80
Show answer

Between 76 and 80: 5.1282% difference

54 and 60
Show answer

Between 54 and 60: 10.5263% difference

38 and 70
Show answer

Between 38 and 70: 59.2593% difference

41 and 56
Show answer

Between 41 and 56: 30.9278% difference

Calculate another

How answers are calculated and checked: methodology.

Questions

Percentage Difference between 40 and 80

The percentage difference between 40 and 80 is 66.6667%: the gap divided by the average. Formula and steps.

What is the percentage change from 40 to 80?

+100%. Percentage change uses the starting value (40) as the base, so it is larger than the percentage difference of 66.6667%.

What is the difference between percentage difference and percentage change?

Percentage change compares a new value with an old one and divides by the old value. Percentage difference compares two values on an equal footing and divides by their average, so the order does not matter.