Sumwise

Percentage Difference between 30 and 42

Between 30 and 42: 33.3333% difference

Difference
33.3333%
Gap
12
Average
36
Ratio
1.4 : 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: |30 − 42| = 12
  2. Average of the values: (30 + 42) ÷ 2 = 36
  3. Divide the gap by the average and multiply by 100: 12 ÷ 36 × 100 = 33.3333%
  4. Check: Work backwards: 0.333333 × 36 = 12, the gap between the values.

In a spreadsheet: =ABS(30-42)/((30+42)/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

42 is 12 more than 30. Measured against their average, 36, that gap is 33.3333%. The result is the same whichever value you name first.

Prices: if one shop charges $30 and another $42 for the same item, the prices differ by 33.3333%.

Why the average is the base

Dividing the gap of 12 by 30 gives 40%, and dividing it by 42 gives 28.5714%. The average, 36, sits between them, so the result does not depend on which value is listed first.

Related results

Results for nearby numbers
30 and 52

Between 30 and 52: 53.6585% difference

30 and 32

Between 30 and 32: 6.4516% difference

40 and 42

Between 40 and 42: 4.878% difference

20 and 42

Between 20 and 42: 70.9677% difference

The other way round: Percentage change from 30 to 42. Percentage difference is symmetric: between 42 and 30 it is the same 33.3333%, so there is one page for each pair of numbers. Percentage change is not: from 30 to 42 is +40%, from 42 to 30 is -28.5714%.

Practice

6 and 19
Show answer

Between 6 and 19: 104% difference

56 and 83
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Between 56 and 83: 38.8489% difference

46 and 50
Show answer

Between 46 and 50: 8.3333% difference

37 and 71
Show answer

Between 37 and 71: 62.963% difference

30 and 31
Show answer

Between 30 and 31: 3.2787% difference

37 and 93
Show answer

Between 37 and 93: 86.1538% difference

Calculate another

How answers are calculated and checked: methodology.

Questions

Percentage Difference between 30 and 42

The percentage difference between 30 and 42 is 33.3333%: the gap divided by the average. Formula and steps.

What is the percentage change from 30 to 42?

+40%. Percentage change uses the starting value (30) as the base, so it is larger than the percentage difference of 33.3333%.

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.