📊 Percentage Calculator
Calculate percentages instantly. Find what percent of a number is, percentage change, and more.
About this tool
Percent math shows up in discounts, tips, school grades, tax rates, and year-over-year growth, yet many people still pause when a headline says “save twenty-five percent” or a dashboard shows a two-point move. This percentage calculator handles the common cases in one place: part-to-whole ratios, what is X percent of Y, and change between two values. Search terms like percent calculator, how to calculate percentage, and percentage change all sit on the same few formulas; the value here is a quick, readable layout so you are not re-deriving arithmetic on a napkin. Use it for sales comparisons, quick checks on data stories, or homework when you need the numbers but not a lecture. Results stay in your session until you leave the page, and the fields are labelled in plain language so you can return months later and still know which box means what. For finance or health decisions, pair your percentage with the original numbers—context still matters as much as the sign.
Frequently Asked Questions
How do I calculate 20% of 500?
Multiply 500 by 0.20 (which is 20/100). 500 × 0.20 = 100. So 20% of 500 is 100.
How do I find the percentage change between two numbers?
Percentage change = ((New Value - Old Value) / Old Value) × 100. For example, from 80 to 100: ((100-80)/80) × 100 = 25% increase.
What percentage is 50 of 200?
(50 / 200) × 100 = 25%. So 50 is 25% of 200.
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