Sumwise

Percentage Difference between 30 and 50

Between 30 and 50: 50% difference

Difference
50%
Gap
20
Average
40
Ratio
1.6667 : 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 − 50| = 20
  2. Average of the values: (30 + 50) ÷ 2 = 40
  3. Divide the gap by the average and multiply by 100: 20 ÷ 40 × 100 = 50%
  4. Check: Work backwards: 0.5 × 40 = 20, the gap between the values.

In a spreadsheet: =ABS(30-50)/((30+50)/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

50 is 20 more than 30. Measured against their average, 40, that gap is 50%. The result is the same whichever value you name first.

Prices: if one shop charges $30 and another $50 for the same item, the prices differ by 50%.

Why the average is the base

Dividing the gap of 20 by 30 gives 66.6667%, and dividing it by 50 gives 40%. The average, 40, sits between them, so the result does not depend on which value is listed first.

Related results

Results for nearby numbers
30 and 60

Between 30 and 60: 66.6667% difference

30 and 40

Between 30 and 40: 28.5714% difference

40 and 50

Between 40 and 50: 22.2222% difference

20 and 50

Between 20 and 50: 85.7143% difference

The other way round: Percentage change from 30 to 50. Percentage difference is symmetric: between 50 and 30 it is the same 50%, so there is one page for each pair of numbers. Percentage change is not: from 30 to 50 is +66.6667%, from 50 to 30 is -40%.

Practice

6 and 32
Show answer

Between 6 and 32: 136.8421% difference

9 and 72
Show answer

Between 9 and 72: 155.5556% difference

18 and 29
Show answer

Between 18 and 29: 46.8085% difference

29 and 71
Show answer

Between 29 and 71: 84% difference

63 and 73
Show answer

Between 63 and 73: 14.7059% difference

33 and 84
Show answer

Between 33 and 84: 87.1795% difference

Calculate another

How answers are calculated and checked: methodology.

Questions

Percentage Difference between 30 and 50

The percentage difference between 30 and 50 is 50%: the gap divided by the average. Formula and steps.

What is the percentage change from 30 to 50?

+66.6667%. Percentage change uses the starting value (30) as the base, so it is larger than the percentage difference of 50%.

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.