Sumwise

What is the Percentage Difference from 42 to 43?

From 42 to 43 is a 2.381% increase

Change
2.381%
Difference
1
New ÷ old
1.02381
Direction
increase

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

How to work it out

  1. Difference: 43 − 42 = 1
  2. Divide by the starting value: 1 ÷ 42 = 0.02381
  3. Multiply by 100: 2.381%
  4. Check: Work forwards from the start: 42 × (1 + 0.02381) = 42 × 1.02381 = 43.

In a spreadsheet: =(43-42)/42*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 1.0238 times the old one: for every 100 at the start there are now 102.381.

Prices: an item whose price rises from $42 to $43 has gone up by 2.381%.

Why the change back is different

A 2.381% rise followed by a 2.381% fall does not bring you back to 42: it gives 41.9762. The second percentage is taken of 43, not of 42, so to undo this change you need 2.3256% instead.

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The other way round: Percentage difference from 43 to 42

Practice

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Calculate another

How answers are calculated and checked: methodology.

Questions

What is the Percentage Difference from 42 to 43?

Going from 42 to 43 is a 2.381% increase. Formula and steps.

Is going from 42 to 43 an increase or a decrease?

An increase: the value grew by 1, which is 2.381% of the starting value.

What is the percentage change from 43 back to 42?

-2.3256%. It is a different number because the starting value is now 43, not 42.