Sumwise

Percentage Difference between 30 and 80

Between 30 and 80: 90.9091% difference

Difference
90.9091%
Gap
50
Average
55
Ratio
2.6667 : 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 − 80| = 50
  2. Average of the values: (30 + 80) ÷ 2 = 55
  3. Divide the gap by the average and multiply by 100: 50 ÷ 55 × 100 = 90.9091%
  4. Check: Work backwards: 0.909091 × 55 = 50, the gap between the values.

In a spreadsheet: =ABS(30-80)/((30+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 50 more than 30. Measured against their average, 55, that gap is 90.9091%. The result is the same whichever value you name first.

Prices: if one shop charges $30 and another $80 for the same item, the prices differ by 90.9091%.

Why the average is the base

Dividing the gap of 50 by 30 gives 166.6667%, and dividing it by 80 gives 62.5%. The average, 55, sits between them, so the result does not depend on which value is listed first.

Related results

Results for nearby numbers
30 and 90

Between 30 and 90: 100% difference

30 and 70

Between 30 and 70: 80% difference

40 and 80

Between 40 and 80: 66.6667% difference

20 and 80

Between 20 and 80: 120% difference

The other way round: Percentage change from 30 to 80. Percentage difference is symmetric: between 80 and 30 it is the same 90.9091%, so there is one page for each pair of numbers. Percentage change is not: from 30 to 80 is +166.6667%, from 80 to 30 is -62.5%.

Practice

7 and 84
Show answer

Between 7 and 84: 169.2308% difference

32 and 52
Show answer

Between 32 and 52: 47.619% difference

1 and 17
Show answer

Between 1 and 17: 177.7778% difference

33 and 44
Show answer

Between 33 and 44: 28.5714% difference

13 and 73
Show answer

Between 13 and 73: 139.5349% difference

56 and 80
Show answer

Between 56 and 80: 35.2941% difference

Calculate another

How answers are calculated and checked: methodology.

Questions

Percentage Difference between 30 and 80

The percentage difference between 30 and 80 is 90.9091%: the gap divided by the average. Formula and steps.

What is the percentage change from 30 to 80?

+166.6667%. Percentage change uses the starting value (30) as the base, so it is larger than the percentage difference of 90.9091%.

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.