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Percentage calculator
Work out a percentage of an amount, a percentage change, and what percentage one number is of another.
Rates last checked on 9 November 2026.
Percentage of an amount
12
Percentage change
25%
What percent one number is of another
20%
How this is worked out
X% of Y is X divided by 100, multiplied by Y. A percentage change is the difference divided by the starting number. The share is the part divided by the whole.
Results are rounded to two decimal places, which is enough for money. A percentage change cannot start from zero.
Questions
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For guidance only. This is not financial advice, legal advice, or a mortgage offer. Check the original invoice, contract, or lender illustration before you rely on a figure.
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