How to Use the Percentage Calculator
Percentages are everywhere — discounts, taxes, grades, statistics, and financial calculations. The ToolPrime Percentage Calculator handles all common percentage questions: "What is X% of Y?", "X is what percent of Y?", and percent increase/decrease. Results include step-by-step explanations.
1 Open the Percentage Calculator
Navigate to the Percentage Calculator tool page.
2 Choose your calculation type
Select the type of percentage calculation you need from the available options.
3 Enter your values
Type the numbers into the input fields. Results update instantly as you type.
4 Read the explanation
The tool shows the result along with the formula and step-by-step calculation.
Common Use Cases
- Calculating sales discounts (e.g., "What is 25% of $80?")
- Finding grade percentages for exams
- Computing tax amounts on purchases
- Analyzing percent change in data sets
Pro Tips
Use "X is what percent of Y" to find your score as a percentage.
For tip calculations, try 15%, 18%, or 20% of the bill total.
Percent increase = ((new - old) / old) x 100.
Try it yourself
Open Percentage Calculator