Percentage Calculator
A percentage calculator is a free online tool that solves percentage problems instantly β such as finding X% of Y, or what percent X is of Y.
How to use Percentage Calculator
- Choose calculation type β Select from 'X% of Y', 'X is what % of Y', or '% increase/decrease'.
- Enter numbers β Fill in the required values.
- Get result β The answer appears instantly with the formula shown.
Key features
- Multiple calculation modes
- Shows the formula used
- Instant results
- Mobile-friendly
- Free and unlimited
What is a Percentage?
A percentage is a way of expressing a number as a fraction of 100. The symbol '%' means 'per hundred.' Percentages are used everywhere: discounts in shops, interest rates on loans, tax rates, tips at restaurants, test scores, and business growth metrics. Understanding percentages is essential for financial literacy and everyday decision-making.
The Three Percentage Problems
Almost every percentage question falls into one of three categories: (1) What is X% of Y? β used for discounts, tax, tips. (2) X is what % of Y? β used for scores, market share, ratios. (3) Percentage change from X to Y? β used for price changes, growth rates, inflation. Our calculator handles all three with dedicated modes.
Real-World Examples
A βΉ1,500 product with a 25% discount saves βΉ375, so the final price is βΉ1,125. A test score of 42 out of 50 is 84%. A stock that rises from βΉ100 to βΉ125 grew 25%. A salary that goes from βΉ50,000 to βΉ55,000 increased 10%. Every one of these can be solved in under a second using our tool.
Why Use Our Calculator?
Manual percentage calculations invite errors, especially in business contexts. Our calculator is accurate, instant, and shows the formula so you can verify. Whether you're computing GST, a discount, or a growth rate, the answer is one click away.
Pro tips
- For discounts: final = original Γ (1 - discount/100)
- Percentage increase and decrease are not symmetric β a 50% drop needs a 100% rise to recover
- Always double-check the base amount β 10% of 100 β 10% of 1000
- Show formulas in business docs for transparency
Common use cases
- Calculating shopping discounts
- Computing tax amounts
- Tracking business growth rates
- Figuring out tips at restaurants
- Analyzing test scores and grades
Frequently asked questions
How do I calculate a percentage?+
Divide the part by the whole and multiply by 100. Our tool does it automatically.
Can I calculate percentage increase?+
Yes, use the '% increase/decrease' mode.
Is it free?+
Yes, completely free.
Can I see the formula?+
Yes β the tool shows the calculation used.
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