How to Use
Select an operation: Add, Subtract, Multiply, Divide, or Simplify.
Enter the whole part (optional) and the numerator and denominator for the first fraction.
For two fraction operations, enter the second fraction the same way.
Click Calculate to see the result, the full working, and the decimal equivalent.
Click Reset to clear all fields and start over.
Precision Limits for Large Numbers
JavaScript uses 64-bit floating-point arithmetic, which may lose precision for intermediate products of very large numerators and denominators exceeding roughly 2^53. While this does not affect typical homework or measurement fractions, extremely large values might result in slight rounding errors.
How Fraction Operations Work
The calculator groups operations by mathematical logic: addition and subtraction require finding a common denominator, while multiplication and division rely on cross-multiplication or reciprocal flipping. Simplification uses the Euclidean algorithm to find the greatest common divisor, ensuring the result is in its lowest terms.
Step-by-Step Calculation Example
- Input fractions: 1 1/2 and 2 1/4
- Convert to improper fractions: 3/2 and 9/4
- Find lowest common denominator: 4
- Convert first fraction: 6/4
- Add numerators: 6 + 9 = 15
- Result fraction: 15/4
- Convert to mixed number: 3 3/4
- Calculate decimal equivalent: 3.75
When To Use This Calculator
- Verifying homework solutions for algebra or geometry problems
- Checking measurements in cooking recipes requiring precise ratios
- Validating construction calculations involving material cuts
- Teaching students the step-by-step logic of fraction arithmetic
- Converting mixed numbers to decimals for data entry
Fractions vs. Decimals: When Each is Clearer
Key Features
Step-By-Step Calculation Breakdown
Shows the logic for finding the lowest common denominator, creating equivalent fractions, and applying the Euclidean algorithm to simplify results.
Mixed Number Input Support
Accepts whole numbers alongside numerators and denominators to process mixed fractions like 1 3/4 without manual conversion.
Automatic Fraction Simplification
Reduces all output fractions to their lowest terms instantly using the Euclidean algorithm to determine the greatest common divisor.
Single Fraction Simplifier
Converts a single input fraction into its mixed number form and decimal equivalent without requiring a second operand.
Privacy And Security
This tool runs entirely in your browser. No data is sent to a server. All calculations happen locally on your device.
Frequently Asked Questions
Can I Enter Negative Fractions?
Place the negative sign on the whole part or the numerator to indicate a negative value. The calculator automatically handles sign propagation when converting mixed numbers to improper fractions for arithmetic operations. This ensures accurate results for all addition, subtraction, multiplication, and division scenarios involving negative numbers.
What Happens With Very Large Numbers?
JavaScript uses 64-bit floating-point arithmetic internally, which may cause precision loss for intermediate products exceeding roughly 2^53. While typical homework problems and standard measurements remain unaffected, extremely large numerators or denominators might yield slightly inaccurate results. Users should expect precise calculations for standard educational and practical fraction tasks.
Why Does Simplify Mode Show A Mixed Number?
The tool displays a mixed number when the numerator exceeds the denominator to provide a clearer representation of the value. This format separates the whole number portion from the remaining fractional part for easier interpretation of the result. Users receive both the simplified improper fraction and the mixed number form simultaneously in the results card.