percentage of
what % is
What is a Percentage Calculator?
The Percentage Calculator is a versatile utility for solving the three most common types of percentage problems: finding a percentage of a number, finding what percentage one number is of another, and finding the original number from a percentage. Percentages are used everywhere—from calculating discounts and tips to analyzing growth metrics and test scores.
A percentage is simply a ratio expressed as a fraction of 100. It is denoted using the '%' sign. Understanding percentages is crucial for financial literacy (interest rates, tax), shopping (sales, VAT), and general data literacy. For example, knowing that '30% off' means you pay 70% of the price helps you calculate final costs instantly.
Our tool provides dedicated inputs for the two most frequent questions: 'What is X% of Y?' (Example: What is 20% of 150?) and 'X is what % of Y?' (Example: 25 is what % of 200?). By separating these logic flows, we prevent the confusion often caused by generic single-input calculators.
The interface is designed for speed, with instant 'calculate-on-click' functionality and clear, large result displays. It handles decimals and large numbers effortlessly, making it suitable for both simple schoolwork checking and complex business margin calculations.
1How to Use
- Identify your Problem: Are you trying to find a part of a whole (Left Card) or a ratio (Right Card)?
- For 'Percentage Of': Enter the percentage in the first box (e.g., 20) and the total value in the second box (e.g., 1000). Click Calculate to get the value (200).
- For 'What % Is': Enter the part value in the first box (e.g., 50) and the total value in the second box (e.g., 200). Click Calculate to get the percentage (25%).
- Read Result: The bold text at the bottom of the card shows your answer.
- Reset: Simply type over existing numbers to perform a new calculation.
★Key Features
- Dual-Mode Interface: Solves 'Percent Value' and 'Percent Ratio' problems side-by-side.
- Decimal Support: Accurately handles floating point numbers (e.g., 12.5% of 49.99).
- Clean Logic: Explicit labels ('What is', '% of', 'is what % of') reduce cognitive load and formula errors.
- Instant Feedback: Results appear immediately on button press.
- Mobile Friendly: Large input fields make it easy to use on touchscreens.