Example: Calculate the percentage increase from last year's salary of $50,000 to this year's $55,000
Example: Convert 3/4 of a pizza to a percentage
Example: Adjust the slider to see how much 20% of $100 would be
Percentage: 20%
| Calculation | Actions |
|---|
Perform percentage of a number, percentage increase/decrease, and reverse percentage calculations
Convert between fractions, percentages, and decimals
Visualize percentage changes with an adjustable slider
View and manage recent calculations with copy and delete options
Ensure accurate results with built-in error checking for user inputs
Percentages are a fundamental mathematical concept used to express parts of a whole. They are widely used in finance, statistics, and everyday calculations. A percentage is a number or ratio expressed as a fraction of 100. The word "percent" comes from the Latin "per centum," meaning "by the hundred." Percentages are often denoted using the percent sign (%). For example, 45% (read as "forty-five percent") is equivalent to the fraction 45/100, or the decimal 0.45. Percentages are crucial in various fields, including business (e.g., calculating discounts, tax rates, and interest), education (grading systems), and data analysis (expressing proportions and changes).
The Percentage Calculator uses several formulas for its calculations:
1. Percentage of a number: result = (percentage / 100) * number
2. Percentage increase/decrease: change = ((to - from) / from) * 100
3. Reverse percentage: original value = final value / (1 + percentage / 100)
4. Fraction to percentage: percentage = (numerator / denominator) * 100
5. Decimal to percentage: percentage = decimal * 100
6. Percentage to decimal: decimal = percentage / 100
These formulas allow for quick and accurate percentage calculations across various scenarios.