Sumwise

What is the Percentage Difference from 20 to 31?

From 20 to 31 is a 55% increase

Change
55%
Difference
11
New ÷ old
1.55
Direction
increase

Sumwise · Data: exact arithmetic; unit definitions from NIST SP 811 · Updated · How we check it

How to work it out

  1. Difference: 31 − 20 = 11
  2. Divide by the starting value: 11 ÷ 20 = 0.55
  3. Multiply by 100: 55%
  4. Check: Work forwards from the start: 20 × (1 + 0.55) = 20 × 1.55 = 31.

In a spreadsheet: =(31-20)/20*100. Always divide by the starting value, not the new one. A rise from 40 to 50 is +25%, but the fall from 50 back to 40 is −20%.

What the result means

The new value is 1.55 times the old one: for every 100 at the start there are now 155.

Prices: an item whose price rises from $20 to $31 has gone up by 55%.

Why the change back is different

A 55% rise followed by a 55% fall does not bring you back to 20: it gives 13.95. The second percentage is taken of 31, not of 20, so to undo this change you need 35.4839% instead.

Related results

Results for nearby numbers
20 to 29

From 20 to 29 is a 45% increase

20 to 30

From 20 to 30 is a 50% increase

20 to 32

From 20 to 32 is a 60% increase

20 to 33

From 20 to 33 is a 65% increase

20 to 41

From 20 to 41 is a 105% increase

The other way round: Percentage difference from 31 to 20

Practice

5 to 23
Show answer

From 5 to 23 is a 360% increase

81 to 46
Show answer

From 81 to 46 is a 43.2099% decrease

18 to 60
Show answer

From 18 to 60 is a 233.3333% increase

39 to 80
Show answer

From 39 to 80 is a 105.1282% increase

50 to 86
Show answer

From 50 to 86 is a 72% increase

46 to 59
Show answer

From 46 to 59 is a 28.2609% increase

Calculate another

How answers are calculated and checked: methodology.

Questions

What is the Percentage Difference from 20 to 31?

Going from 20 to 31 is a 55% increase. Formula and steps.

Is going from 20 to 31 an increase or a decrease?

An increase: the value grew by 11, which is 55% of the starting value.

What is the percentage change from 31 back to 20?

-35.4839%. It is a different number because the starting value is now 31, not 20.