Formula guide

Percentage Decrease Calculator formula

Percent change is calculated by subtracting the old value from the new value, dividing by the old value, and multiplying by 100.

How the input values are used

Old value

The numeric value is used in the calculation; keep units consistent.

New value

The numeric value is used in the calculation; keep units consistent.

How to interpret the result

  • The result uses Old value and New value. Change one variable at a time to compare its effect on the outcome.
  • Confirm the units, date basis, rounding, and any conditions that fall outside the calculation.
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