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Fractions & Percentages calculators
Explore 4 free fractions & percentages calculators. Calculate in your browser with clear inputs, worked examples, and transparent methods.
4 calculators available
- Fraction Calculator
Add, subtract, multiply, or divide two fractions and reduce the answer to lowest terms.
- Percent Error Calculator
Compare an observed value with an accepted value and calculate absolute and signed percent error.
- Percentage Calculator
Solve percent-of, percent-ratio, and percentage-change questions with the formula shown.
- Ratio Calculator
Simplify a ratio, convert it to fractions and percentages, and scale it to a chosen total.