Percentage Calculator Online
Solve all percentage problems: find percentages, percentage of a number, and percent change.
1. What is X% of Y?
What is% of=30
2. X is what % of Y?
is=25%
3. Percentage Increase or Decrease
FromTo=+25.0%
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How to Use This Tool
STEP 01
Select Calculation Mode
Choose whether you want to find a percentage of a number or percentage change.
STEP 02
Enter the Values
Fill in the two input numbers.
STEP 03
See the Formula & Result
The answer appears instantly along with the exact mathematical formula.
Key Features & Privacy Guarantee
- Three vital calculations: X% of Y, Percentage share, and Percentage change
- Calculates percentage increase and decrease with clear positive/negative tags
- Instant calculations with live updates on keypress
- Formatted step-by-step formula explanation for students and professionals
Frequently Asked Questions
How do you calculate percentage increase?
Percentage increase = ((New Value - Old Value) / Old Value) * 100%. If positive, it is an increase; if negative, it is a decrease.
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