Percentage Calculator

Frequently Asked Questions

• How do I calculate what percentage one number is of another?+
  Divide the part by the whole and multiply by 100. Formula: Percentage = (Part ÷ Whole) × 100. Example: 30 is what percentage of 200? = (30 ÷ 200) × 100 = 15%. Use the X is what % of Y? section above — type the numbers and the answer appears instantly.
• How do I calculate percentage increase or decrease?+
  Percentage change = ((New − Old) ÷ Old) × 100. A positive result is an increase; negative is a decrease. Example: price rose from ₹100 to ₹130 → ((130−100) ÷ 100) × 100 = +30%. Use the Percentage increase/decrease section above.
• How do I add a percentage to a number (like adding GST)?+
  Multiply the number by (1 + percentage/100). Example: ₹1,000 + 18% GST = ₹1,000 × 1.18 = ₹1,180. Use the Add X% to a number section above for instant results. For a full GST breakdown, try our GST Calculator.
• How do I find the original price after a discount?+
  Use the X is Y% of what number? section. If a shirt costs ₹850 after a 15% discount, it is at 85% of the original. Enter 850 and 85 — the result is the original price. Or try our dedicated Discount Calculator for more options.
• How do I calculate percentage in Excel?+
  For X% of Y: =A1*B1/100. For % of one number in another: =(A1/B1)*100. For % change: =((B1-A1)/A1)*100. If you format cells as Percentage (Ctrl+1 → Number → Percentage), Excel multiplies by 100 automatically, so the formula simplifies to =B1/A1.
• What is the difference between percentage and percentage points?+
  A percentage point is an absolute difference between two percentages. If interest rates rise from 5% to 8%, that is a 3 percentage point rise — but a 60% increase in the rate itself. Confusing the two is a common error in news and finance; always check which one is being used.