All-in-One Percentage Tool

1 Value: What is Y% of X?

What is
%
of
=

2 Ratio: X is what percent of Y?

is what % of
?

3 Change: Increase/Decrease from X to Y?

From
to
is

Common Uses in Daily Life

πŸ’° Discounts

Shopping Sales

A $500 item is 20% off. What is the final price? How much do you save?

πŸ“ˆ Growth

Business Metrics

Revenue went from $10,000 to $12,000. What is the month-over-month growth rate?

🧾 Tax & Tips

Tipping

The bill is $200, and you want to leave a 15% tip. What is the total amount?

Calculation Formulas

1. Find Value (Y% of X)

Result = X Γ— (Y / 100)

2. Find Percentage (X is what % of Y)

Result = (X / Y) Γ— 100%

3. Percentage Change (From X to Y)

Result = ((Y - X) / X) Γ— 100%

Frequently Asked Questions

Percentage vs. Percentage Point?
Percentage is a ratio (e.g., grew by 10%). Percentage Point is the arithmetic difference between two percentages. Example: Rate moving from 2% to 3% is a 50% growth, or a 1 percentage point increase.
How to calculate a discount price?
Subtract the discount amount from the original price. Formula: Price Γ— (1 - DiscountRate). For 20% off, multiply by 0.8.
What is negative growth?
When the new value is less than the old value, the change rate is negative. This indicates a decrease or drop in value.
Why is (A/B)*100 same as A/(B/100)?
This is basic arithmetic. Both operations result in A divided by B, then multiplied by 100.
How many decimal places are shown?
We default to two decimal places for clarity, but won't show decimals for whole integer results.
What is Year-over-Year (YoY)?
YoY compares results for the same time period in different years (e.g., this March vs. last March). MoM compares with the previous month.
Can I use this offline?
Yes. Once the page loads, all calculations happen locally in your browser, so it works even without an internet connection.
Is it free?
Yes, this tool is 100% free with no usage limits.

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