How to Use the Percentage Calculator
Pick the calculation you need from the three tabs: "What is X% of Y," "X is what percent of Y," or "Percentage increase/decrease between X and Y." Enter your two numbers into the fields and the answer appears instantly as you type, with no need to press a submit button. Each tab also shows the plain-language formula used, so students can check their own math homework step by step instead of just copying an answer. This tool covers the most common real-world percentage questions — calculating a discount at checkout, figuring out a raise or pay cut, working out exam or grade percentages, or tracking how much a stock, rent, or bill has changed since last month.
People Also Ask (FAQs)
How do I calculate a percentage of a specific number?
To find a percentage of a number, multiply the number by the percentage fraction. For example, to find 20% of 50, you calculate (20/100) * 50 = 10.
How do you calculate a percentage increase or decrease?
Subtract the old value from the new value, divide the result by the old value, and then multiply by 100. A positive result is an increase; a negative result is a decrease.
How do I find the percentage difference between two numbers?
The percentage difference is found by taking the absolute difference between two values, dividing it by the average of the two values, and multiplying by 100.
How do I convert a decimal to a percentage?
To convert a decimal to a percentage, simply multiply the decimal by 100 and add a percent sign (e.g., 0.75 becomes 75%).
What are common real-world uses for a percentage calculator?
Percentage calculators are commonly used to figure out sales discounts, calculate sales tax, determine profit margins, and calculate interest rates or grading scores.