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Free toolFour everyday percentage problems, one tool: X% of a number, X as a percent of Y, percentage change, and discount pricing.
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Y × X ÷ 100. 15% of 2,400 = 360. Tips, commissions, tax estimates.
X ÷ Y × 100. 45 of 60 = 75%. Test scores, targets achieved, market share.
(New − Old) ÷ Old × 100. 80 → 100 = +25%. Sales growth, price hikes. Note the asymmetry: 100 → 80 is −20%, not −25%.
Price × (100 − d) ÷ 100. ₹2,499 at 30% off = ₹1,749.30. Sale pricing, negotiation math.
Multiply the number by the percentage and divide by 100. So 15% of 2,400 = 2,400 × 15 ÷ 100 = 360.
(New − Old) ÷ Old × 100. Going from 80 to 100 is a 25% increase; going from 100 to 80 is a 20% decrease; the direction matters.
Use the discount mode: price × (100 − discount%) ÷ 100. A ₹2,499 item at 30% off is ₹1,749.30.
Accounting software does it on every bill automatically. Busy, Tally and Vyapar at best rates.
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