½ Fraction Calculator
Fractions follow a few fixed rules: add and subtract need a common denominator, multiply goes straight across, and divide flips the second fraction and multiplies. This calculator applies them for you and reduces every answer to lowest terms.
Results show the simplified fraction, the mixed number (like 1 1/2) and the decimal equivalent, so you can use whichever form you need.
How to use this calculator
Enter the two fractions and choose plus, minus, multiply or divide. You get the answer reduced to lowest terms, plus the mixed-number and decimal forms.
- Type the numerator and denominator of your first fraction into the two First fraction fields.
- Pick the Operation: add, subtract, multiply or divide.
- Type the numerator and denominator of your second fraction into the two Second fraction fields.
- Press Calculate and read the simplified result, with the mixed-number and decimal versions shown beside it.
Frequently asked questions
What does this fraction calculator compute?
It adds, subtracts, multiplies and divides two fractions, reducing every answer to lowest terms automatically. The result appears as a simplified fraction, a mixed number and a decimal, so you can take whichever form you need.
What method does it use?
Addition and subtraction use a common denominator; multiplication goes straight across the tops and bottoms; division flips the second fraction and multiplies. The answer is divided through by the greatest common divisor of its numerator and denominator.
Can you show a worked example?
Take 1/2 + 1/4. With a common denominator of 4 that becomes 2/4 + 1/4 = 3/4, which is already in lowest terms and equals 0.75 as a decimal.
What should I watch out for?
A denominator of zero is not allowed and will raise an error, so double-check your bottom numbers. For division, remember that flipping applies only to the second fraction, never the first.