How to use the Fraction Calculator
- Enter the top and bottom of the first fraction.
- Choose add, subtract, multiply or divide.
- Enter the second fraction and read the simplified answer, mixed number and decimal.
How it's calculated
Show the formula
a/b + c/d = (ad + cb) ÷ bd · a/b × c/d = ac ÷ bd · a/b ÷ c/d = ad ÷ bc
Answers are reduced by their highest common factor.
Answers are reduced by their highest common factor.
Answers are simplified to lowest terms.
Worked example
These are the example numbers the calculator opens with. Change any of them above to see your own result.
You enter
| Fraction 1 top | 3 |
|---|---|
| Fraction 1 bottom | 4 |
| Operation | + Add |
| Fraction 2 top | 5 |
| Fraction 2 bottom | 6 |
You get
| Answer | 19/12 |
|---|---|
| Mixed number | 1 7/12 |
| Decimal | 1.583333 |
Tips
- To divide by a fraction, multiply by its upside-down (reciprocal).
Frequently asked questions
How do I simplify a fraction?
Divide the top and bottom by their highest common factor. 18/24 becomes 3/4.
What is a mixed number?
A whole number and a fraction together, like 1 7/12.