Decrease Percent Calculator

The starting value for a change, the accepted (true) value for percent error.
The ending value for a change, the measured (experimental) value for percent error.
Answer for the selected comparison
-50 %
Percentage Change, Difference and Error Calculator
What the answer is
Percentage decrease
In words
50 did not decrease — it rose to 75, which is a decrease of -50% (a negative decrease is an increase of 50%).
Percentage change
50 %
Percentage increase
50 %
Percentage decrease
-50 %
Absolute change (final - initial)
25
Percentage difference
40 %
Percent improvement
50 %
Percent error
50 %
Relative error (a fraction, not a percentage)
0.5
Final / initial
1.5
Direction
increase
Formula used
percent decrease = (initial - final) / |initial| x 100
Worked out from Wikipedia, "Relative change and difference" — relative change uses |x_reference| in the denominator; percentage difference uses the mean of the magnitudes and 1 other source.
The second value is larger than the first, so this is really an increase; the percentage increase is shown alongside.

How this is worked out

3 steps
  1. Fall = 50 - 75 = -25
  2. Divide by the original amount: -25 / 50 = -0.5
  3. Multiply by 100: a decrease of -50%

Results are general information, not financial, tax, legal, medical or engineering advice.