Result updated. Simplified result: 5/6.
Fraction result
Main result from the values entered.
Simplified result
1/2 + 1/3 = 5/6
Mixed number
Not needed
Decimal
0.83333333
Use whole-number numerators and denominators.
How this fraction calculator works
Enter the numerator and denominator for each fraction, then choose add, subtract, multiply or divide. The calculator reduces the result using the greatest common divisor and shows a decimal form for quick checking.
Adding and subtracting fractions
Addition and subtraction use a common denominator internally. The displayed answer is simplified after the operation is complete.
Multiplying and dividing fractions
Multiplication multiplies numerator by numerator and denominator by denominator. Division multiplies by the reciprocal of the second fraction, with a clear warning if that would divide by zero.
What this calculator does not include
This calculator does not currently accept mixed-number input, decimals as fraction inputs or symbolic algebra expressions. It keeps the calculator focused on two ordinary fractions at a time.
Key terms and assumptionsShort notes about whole-number inputs, simplification, zero denominators and decimal display.
- Whole-number fraction inputs
- This calculator uses whole-number numerators and denominators rather than mixed-number input.
- Simplified result
- The result is reduced using the greatest common divisor.
- Zero denominators
- Denominators cannot be zero because division by zero is not a finite result.
- Decimal display
- The decimal result is rounded for display while the simplified fraction remains exact within safe integer limits.
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FAQs
Can this calculator add fractions with different denominators?
Yes. It finds a common denominator internally and then simplifies the result.
Can it subtract, multiply and divide fractions?
Yes. It supports all four basic fraction operations.
What does simplified fraction mean?
A simplified fraction is reduced so the numerator and denominator have no common factor other than 1.
Why can a denominator not be zero?
A denominator of zero would require division by zero, which is not a finite result.
Can I enter negative fractions?
Yes. Negative numerators are supported, and negative denominators are normalized so the denominator displays as positive.
Does it show a decimal answer?
Yes. The calculator shows the simplified fraction and a decimal version.
Does it support mixed-number input?
Not currently. It may show a mixed-number output when useful.
Can I copy the result?
Yes. The simplified result can be copied.