TOOLOG TOOL
Fraction Calculator | Operations, simplification, mixed number, decimal
Enter a quick expression like 1/2 + 1/3 or fill numerator and denominator fields to add, subtract, multiply, or divide fractions and see simplified, mixed-number, decimal, and percent results.
Enter two fractions to add, subtract, multiply, or divide them instantly.
A quick way to calculate fractions
When you are solving homework, checking ratios, or working with recipe math, calculating fractions is only half the job — you usually also want the simplified form and a decimal value.
This tool lets you enter two fractions and instantly see:
simplified fraction / mixed number / decimal / percent.
You can also paste a one-line expression such as 1/2 + 1/3, -7/12 + 5/8, or 3/4 ÷ 2/5 and apply it to the input fields.
Key features
- Add, subtract, multiply, and divide fractions
- Quick expression input for
numerator/denominator operator numerator/denominator - Auto-simplify the final result
- Show mixed-number form when useful
- Show decimal and percent at the same time
- Clear warnings for negative denominators, zero denominators, division by zero, and out-of-range inputs
- Copy the result quickly
How to use it
- Apply a quick expression like
1/2 + 1/3, or enter the numerator and denominator of the first fraction. - Choose an operation.
- Enter the numerator and denominator of the second fraction.
- Check the simplified result, mixed number, decimal, and percent.
For subtraction and division, where order changes the result, use Swap fractions to compare both directions quickly. Enter whole numbers from -10,000,000 to 10,000,000 for each numerator and denominator so the calculator can return an exact result.
If you enter a negative denominator like 1/-2, use Normalize signs to move the sign to the numerator.
Related tools
FAQ
Why show a mixed number too?
A mixed number can be easier to read than an improper fraction in many everyday cases.
Can I calculate negative fractions?
Yes. Enter a negative numerator to work with negative fractions.
Can I enter decimals or very large numbers?
This calculator simplifies fractions made from whole numbers exactly. Decimal inputs are not supported, and each input is limited to an absolute value of 10,000,000 to prevent precision errors.
Which operators work in quick expression input?
Use + for addition, - for subtraction, × or * for multiplication, and ÷ or / for division.
When is percent output useful?
It helps when you want to interpret a fraction as a rate, share, or ratio in percent form.