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A Percentage Calculator is a versatile math tool that helps you solve various problems involving proportions and ratios. Whether you are calculating a discount at a store, determining a pay raise, or analyzing data trends, percentages are the universal language of comparison.
Our calculator simplifies these tasks by offering three distinct modes: finding a percentage of a number, calculating percentage change, and applying an increase or decrease.
If you prefer to do the math manually, here are the formulas our calculator uses:
(Percentage / 100) * Number((New Value - Old Value) / Old Value) * 100Original Value * (1 + Percentage / 100)Original Value * (1 - Percentage / 100)Percentages are used everywhere in daily life:
A percentage point is the arithmetic difference between two percentages. For example, if an interest rate rises from 5% to 7%, it has increased by 2 percentage points, but it has increased by 40% (2 is 40% of 5).
To calculate a 15% tip on a $40 bill, multiply 40 by 0.15 to get $6. Our "What is X% of Y?" mode is perfect for this.
Yes! A percentage greater than 100 means the value has more than doubled. For example, 200% of 50 is 100. A 150% increase on 100 results in 250.