Sumwise

Percentage Change from 20 to 80

From 20 to 80 is a 300% increase

Change
300%
Difference
60
New ÷ old
4
Direction
increase

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. Difference: 80 − 20 = 60
  2. Divide by the starting value: 60 ÷ 20 = 3
  3. Multiply by 100: 300%
  4. Check: Work forwards from the start: 20 × (1 + 3) = 20 × 4 = 80.

In a spreadsheet: =(80-20)/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 4 times the old one: for every 100 at the start there are now 400. The value has more than doubled.

Prices: an item whose price rises from $20 to $80 has gone up by 300%.

Why the change back is different

A 300% rise followed by a 300% fall does not bring you back to 20: it gives -160. The second percentage is taken of 80, not of 20, so to undo this change you need 75% instead.

Related results

Results for nearby numbers
20 to 78

From 20 to 78 is a 290% increase

20 to 79

From 20 to 79 is a 295% increase

20 to 81

From 20 to 81 is a 305% increase

20 to 82

From 20 to 82 is a 310% increase

20 to 90

From 20 to 90 is a 350% increase

The other way round: Percentage change from 80 to 20. Percentage change is not symmetric: from 20 to 80 is 300%, but from 80 back to 20 is -75%, because the starting value is the base. For a comparison that is the same both ways, use the percentage difference between 20 and 80: 120%. See Percentage difference between 20 and 80.

Practice

5 to 89
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From 5 to 89 is a 1,680% increase

43 to 89
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From 43 to 89 is a 106.9767% increase

16 to 70
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From 16 to 70 is a 337.5% increase

37 to 22
Show answer

From 37 to 22 is a 40.5405% decrease

75 to 34
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From 75 to 34 is a 54.6667% decrease

40 to 75
Show answer

From 40 to 75 is a 87.5% increase

Calculate another

How answers are calculated and checked: methodology.

Questions

Percentage Change from 20 to 80

Going from 20 to 80 is a 300% increase. Formula and steps.

Is going from 20 to 80 an increase or a decrease?

An increase: the value grew by 60, which is 300% of the starting value.

What is the percentage change from 80 back to 20?

-75%. It is a different number because the starting value is now 80, not 20.