Math Calculators
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Enter the values and review the result.
Calculation assumptions
- *Denominators cannot be zero.
- *Division by a fraction means multiplying by its reciprocal.
- *Results are simplified to lowest terms when possible.
Enter your values and press Calculate.
Results and breakdowns will appear here after a valid calculation.
Working with Fractions
Fractions represent parts of a whole. To add or subtract them, use a common denominator. To multiply, multiply numerator by numerator and denominator by denominator. To divide, multiply by the reciprocal.
Example: 1/2 + 1/4 becomes 2/4 + 1/4 = 3/4. The calculator also shows the decimal value.
Common mistakes
- Do not use zero as a denominator.
- When dividing, the second fraction cannot be zero.
- For addition and subtraction, remember that denominators must be aligned before combining.
- A negative denominator is normalized into the numerator in the simplified result.
Transparency note
Accuracy and limitations
Calzivo tools are built for practical estimates, conversions, and checks. Some tools use standard formulas or simplified assumptions, and results can be affected by input accuracy, rounding, units, local rules, or changing official requirements.
Results depend on the values you enter and any simplified assumptions used by the tool. Verify important results before making decisions or submitting official information.
How to Use This Tool
Use these steps to enter the right inputs and interpret the result correctly.
Enter the numerator and denominator for the first fraction.
Select the mathematical operation.
Enter the numerator and denominator for the second fraction.
The tool will provide the simplified fraction and its decimal equivalent.
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Related Guides
Background reading and explanations related to Fraction Calculator.
Frequently Asked Questions
Common questions about Fraction Calculator and how to read the result.
Does it simplify the fraction?
Yes, the calculator automatically reduces the result to its simplest form.
Can a denominator be zero?
No. Division by zero is undefined, so denominators must not be zero.
How do I divide fractions?
Multiply the first fraction by the reciprocal of the second fraction.
Can I use negative fractions?
Yes. Negative numerators or denominators are supported, and the sign is normalized in the result.
Why does addition need a common denominator?
Fractions must represent the same size parts before they can be added or subtracted directly.
Does it show a decimal?
Yes. The calculator shows the simplified fraction and a decimal approximation.