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Percentages & change Calculator

Find shares, percentage amounts and signed changes. This free percentages & change calculator shows the calculation and its assumptions so you can compare your own figures.

Calculated on your device

Your results

Part Of Whole Percent25%

Find shares, percentage amounts and signed changes.

Change Percent20%

Calculated outcomes

Percentage Of Whole
15
Absolute Change
20

Assumptions and estimates

  • Method: Share = part ÷ whole × 100. Change = (new − old) ÷ absolute old × 100.
  • A zero reference has no defined percentage ratio; unavailable results display a dash.

Useful next steps

  1. Use Compare options to test an alternative side by side.
  2. Copy, print or download a record of this calculation when you need one.

Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.

How the percentages & change calculation works

Share = part ÷ whole × 100. Change = (new − old) ÷ absolute old × 100.

A zero reference has no defined percentage ratio; unavailable results display a dash.

Using this calculator

  1. Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
  2. Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
  3. Review part of whole percent and change percent, then read the stated assumptions and eligibility conditions before using the result.

Worked example

This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.

See example inputs
Part
25
Whole
100
Percentage to apply (%)
15
Old value
100
New value
120
Part Of Whole Percent
25%
Change Percent
20%

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