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अवलोकन

Percentages are mathematical shorthand for fractions out of 100 — a way to compare values regardless of their original scale. They appear everywhere: tax rates, interest, discounts, statistics, polls, grades, tips, and probabilities. Despite their simplicity, percentage problems trip up many people because the same phrase can mean different things — '20% more' increases by a fifth, while '20% of' takes only the fifth. This calculator handles all common percentage operations: basic percentage of a number, percentage change, finding what percent X is of Y, and reverse calculations.

कैसे उपयोग करें (चरण-दर-चरण)

1. 1

   Pick the type of question

   What is X% of Y? X is what % of Y? Or 'X changed by Y%'. The form changes to fit each case so you're never plugging numbers into the wrong slot.

2. 2

   Enter the numbers

   Whole numbers or decimals — doesn't matter. The result updates as you type.

3. 3

   Read the result with the worked-out formula

   Seeing 'X% of Y = (X ÷ 100) × Y = result' helps if you're doing this for a school assignment or want to verify by hand.

यह कैसे काम करता है

The four common percentage operations: (1) X% of Y = X × Y / 100, (2) Percentage change = (new − old) / old × 100, (3) X is what % of Y = X / Y × 100, (4) Reverse: Y is X% of what = Y × 100 / X. The calculator lets you switch between modes. All math is done with full floating-point precision, then rounded only for display. Multi-step percentages (e.g., '15% discount, then 8% tax') don't simply add — apply each in sequence.

कब उपयोगी है

Calculate tax-inclusive prices when shopping, restaurant tips, percentage of test/quiz scores, employee commission calculations, percentage weight loss/gain, investment returns, statistics in reports, and progress bars. Particularly useful for comparing 'X% off' vs 'X% cashback' deals — they often produce different effective discounts.

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