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Percentage Calculator

All-in-one percentage tool for ratios, percentage changes, and inverse differences. Perfect for business discounts, salary raises, and everyday data analysis.

Guide & Insights

Master Percentages Instantly

Whether you're calculating a tip, a pay raise, or a discount, percentages are everywhere. Our Online Percentage Calculator simplifies these math problems, giving you accurate results for common scenarios like "What is X% of Y?" or "What percentage is X of Y?".

Common Formulas

  • Percentage of(Value ร— Percentage) / 100
  • Percentage Increase((New - Old) / Old) ร— 100
  • Percentage Decrease((Old - New) / Old) ร— 100

Frequently Asked Questions

Q1How do I calculate the percentage increase or decrease between two numbers?โ–ผ
The percentage change formula is: Percentage Change (%) = [(New Value - Original Value) / Original Value] ร— 100%. A positive result indicates growth, while a negative number indicates a decrease.
Q2What is the difference between Year-over-Year (YoY) and Month-over-Month (MoM)?โ–ผ
YoY (Year-over-Year) compares a metric to the same period in the previous year (e.g. March 2026 vs. March 2025) to smooth out seasonality. MoM (Month-over-Month) compares consecutive months (e.g. March 2026 vs. February 2026) to track immediate growth trajectory.
Q3How do I find the original price when given the discounted price and discount percentage?โ–ผ
The reverse formula is: Original Price = Discounted Price / (1 - Discount Percentage). For instance, an item on sale for $80 after a 20% discount had an original price of $80 / (1 - 0.20) = $100.
Q4What is the difference between percentage and percentage points?โ–ผ
A percentage measures relative change, whereas a percentage point measures the absolute arithmetic difference between two percentages. For example, an interest rate rising from 4% to 5% has increased by 1 percentage point, which represents a 25% relative increase.

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