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Attendance Calculator
Turn attended/total into a percentage and plan around a 75% threshold.
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Percentage Calculator
Work out what percent one number is of another, take a percent of a number, and track percentage change and difference — all in your browser.
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Result
How it works
Four percentage questions, answered
What is P% of N?
Multiply and divide by 100: P% of N = N × P ÷ 100. Useful for discounts, tips, interest, and marks.
What % is A of B?
Divide the part by the total: (A ÷ B) × 100. Useful for tests scored, attendance, and completion.
% change and % difference
Change is anchored to the old value ((new − old) ÷ old × 100); difference compares two values against their average — the right tool when neither is the baseline.
Questions
Percentage FAQ
How do I work out what a percentage of a number is?
Multiply the number by the percentage and divide by 100. For 15% of 800: (800 × 15) ÷ 100 = 120. The "What is P% of N?" mode does exactly this.
How do I convert a fraction to a percentage?
Divide the top by the bottom and multiply by 100. ⅘ → (4 ÷ 5) × 100 = 80%. The "What % is A of B?" mode applies the same rule to any two numbers.
Why can't I enter a zero in "% change"?
Percent change divides by the old value, and a zero old value has no meaningful percentage. Switch to "% difference A vs B" for that comparison.