DP Tools
Percentage Calculator
A versatile tool for all your percentage calculation needs.
What is X% of Y?
e.g., What is 5% of 200?
of
X is what percent of Y?
e.g., 10 is what percent of 200?
is what percent of
Percentage Increase / Decrease
e.g., What is the percentage change from 100 to 150?
Fromto

Understanding Percentages

Percentages are a fundamental part of everyday life, from calculating a tip at a restaurant to understanding financial reports. A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%". Our calculator provides three common percentage calculations to simplify these tasks for you.

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1. How to Calculate a Percentage of a Number

To find a percentage of a number, you convert the percentage to a decimal and multiply it by the number. For example, to find 20% of 200, you would calculate 0.20 * 200 = 40. Our first calculator does this for you automatically.

2. How to Calculate What Percentage One Number is of Another

To determine what percentage one number (the 'part') is of another number (the 'whole'), you divide the part by the whole and multiply the result by 100. For example, to find what percentage 50 is of 200, you would calculate (50 / 200) * 100 = 25%. Our second calculator handles this common scenario.

3. How to Calculate Percentage Change

To calculate the percentage increase or decrease between two numbers, you subtract the initial value from the final value, divide that result by the initial value, and then multiply by 100. The formula is ((Final Value - Initial Value) / Initial Value) * 100. A positive result indicates a percentage increase, while a negative result indicates a decrease. Our third calculator simplifies this for you.

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