Fraction Calculator
Add, subtract, multiply, or divide fractions instantly, with results simplified and shown as decimals too.
Result
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Enter both fractions above.
How Fraction Math Works
Addition & subtraction require a common denominator. This calculator finds one automatically, combines the numerators, then simplifies the result.
Multiplication is the most direct operation, multiply the numerators together and the denominators together.
Division flips the second fraction (its reciprocal) and multiplies.
Every result is automatically reduced to its simplest form using the greatest common divisor (GCD) of the numerator and denominator.
How to Use This Fraction Calculator
Choose an operation: add, subtract, multiply, or divide.
Enter the numerator and denominator for each fraction.
Your result appears instantly, already simplified, with a decimal equivalent shown alongside it.
Frequently Asked Questions
Does this calculator simplify the result automatically?
Yes. Every answer is reduced to its lowest terms using the greatest common divisor of the numerator and denominator.
Can I use negative numbers?
Yes — enter a negative numerator or denominator and the calculator will handle the sign correctly.
Will it show a mixed number if the result is greater than 1?
Yes, when applicable the result includes a mixed-number form (for example, 7/4 is shown alongside 1 3/4) in addition to the simplified fraction and decimal.
What happens if I enter zero as a denominator?
Division by zero is undefined, so the calculator will flag the input as invalid rather than return a result.