How to use the Fraction Calculator
The fraction calculator adds, subtracts, multiplies or divides two fractions and simplifies the answer.
Open the Fraction Calculator →
What you need to enter
- Numerator 1
- Denominator 1
- Operation
- Numerator 2
- Denominator 2
The formula
a/b + c/d = (ad + bc) ÷ bd. a/b × c/d = ac ÷ bd. a/b ÷ c/d = ad ÷ bc. Divide top and bottom by the GCF to simplify.
Worked example
Using the default values in the calculator:
- Numerator 1: 1
- Denominator 1: 2
- Operation: +
- Numerator 2: 3
- Denominator 2: 4
| Result | 5/4 |
| Mixed number | 1 1/4 |
| Decimal | 1.25 |
Tips for better results
- Simplify to lowest terms.
- Convert mixed numbers to improper fractions first.
Common mistakes to avoid
- Adding denominators.
- Forgetting to flip the second fraction when dividing.