Percent of an amount, adding or taking off a percentage, and the percent change between two amounts.
Figures checked: October 2026 · Methodology and sources
Enter an amount and a percentage to get that percentage of the amount, and the amount with the percentage added or taken off. Add a second amount to see the percent change between the two.
The percent change is (new − old) / old × 100. Going from 200 to 230 is +15 %; going back from 230 to 200 is −13 %.
Because each percentage is calculated on a different starting amount. +10 % and then −10 % leaves you at 99 % of where you started.
Divide the price by 1 plus the tax rate: with 8.1 % VAT, 108.10 / 1.081 = 100.
The difference between two percentages: from 2 % to 3 % is one percentage point, but a 50 % increase.
Indicative results. This is not financial advice.
Know how much you will have left at the end of the month
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