Everyday Tools
Fraction to Percentage Calculator
Convert any fraction, such as marks out of a test or a recipe ratio, into a percentage instantly.
Your results
Percentage75%
Calculation breakdown
- Percentage
- (Numerator ÷ Denominator) × 100
Worked example
A student scores 3 out of 4 on a quiz: 3 ÷ 4 × 100 = 75%.
Assumptions
- Works with negative numerators or denominators.
- Fractions greater than one produce percentages over 100%.
How this calculator works
This calculator converts a fraction into a percentage by dividing the numerator by the denominator and multiplying by 100. It's useful for school marks, survey results or any ratio expressed as parts of a whole.
Frequently asked questions
What if the denominator is zero?
Division by zero is not defined, so the calculator shows an error message if the denominator is zero.
Can the numerator be bigger than the denominator?
Yes, this produces a percentage over 100%, which is valid for fractions greater than one.
Does it handle negative fractions?
Yes, negative numerators or denominators are calculated correctly and will show a negative percentage where appropriate.
Related calculators
Percentage to Fraction CalculatorConvert a percentage into its simplest fraction form, showing both the raw and simplified fractions.Percentage Difference CalculatorWork out the percentage difference between two numbers, useful for comparing prices, scores or measurements quickly.Reverse Percentage CalculatorFind the original value before a percentage increase or decrease was applied, handy for working backwards from a sale price or tax-inclusive figure.Ratio CalculatorSimplify a ratio of two or three numbers to its lowest terms, useful for recipes, mixing solutions or scaling drawings.Proportion CalculatorSolve for the missing value in a proportion, such as scaling ingredients or converting rates, using cross-multiplication.