Math Calculator
Fraction Calculator
Add, subtract, multiply, or divide two fractions.
Operation
1/2 + 1/4 =
3/4
- Decimal equivalent
- 0.75
How it works
Enter two fractions and pick an operation. The result is automatically simplified to lowest terms, along with its decimal equivalent.
Adding and subtracting fractions works by finding a common denominator; multiplying just multiplies straight across; dividing multiplies by the second fraction flipped upside down (its reciprocal).
Formula
Add/Subtract: (n1×d2 ± n2×d1) / (d1×d2) Multiply: (n1×n2) / (d1×d2) Divide: (n1×d2) / (d1×n2)
Example
1/2 + 1/4 = (1×4 + 1×2) / (2×4) = 6/8, which simplifies to 3/4.
Frequently asked questions
Why is my result already simplified?
The calculator automatically reduces the result to lowest terms by dividing both the numerator and denominator by their greatest common divisor, the same way you'd simplify by hand.
Can I use negative numbers?
Yes — a negative numerator or denominator both work; the sign is normalized in the result.