Percentage literally means "per 100". It is the most common mathematical operation in daily life, yet it confuses almost everyone.
The Percentage Calculator handles the three most common scenarios:
1. Percentage of a Number
"What is 20% of 150?"
Use for tipping (15-20%), calculating sales tax, or finding commission.
2. Percentage Increase / Decrease
"My rent went from $1000 to $1200. What is the % increase?"
Use for calculating inflation, salary raises, or stock market gains/losses.
3. X is what % of Y?
"I scored 45 out of 60 on the test. What is my grade?"
Use for test scores or progress completion.
The Formulas
- % of:
(Percentage / 100) * Number - Increase:
((New - Old) / Old) * 100 - What %:
(Part / Whole) * 100