Percentage Calculator
Percent of a number, percent change, and more.
½
Fraction Calculator
Add, subtract, multiply, and divide fractions with auto-simplify.
Simplified
5/6
Decimal
0.833333333333
About Fraction Calculator
Fraction arithmetic is easy to get wrong by hand — finding common denominators, reducing, and handling negatives or mixed numbers. This tool takes two fractions as numerator/denominator pairs and applies +, −, ×, or ÷.
Results are auto-reduced with the greatest common divisor (GCD), with the sign on the numerator. Optionally show a mixed number (e.g. 7/3 → 2 1/3) and always see the decimal value. Division by zero and a zero denominator are reported clearly.
Everything runs in your browser; nothing is sent to toco.tools servers.
How to use
- Enter numerators and denominators for both fractions
- Choose an operation (+ − × ÷)
- Read the simplified result and decimal (toggle mixed number if needed)
FAQ
Can I use negative fractions?
Yes. Put a minus on the numerator. The result keeps the sign on the numerator.
What is a mixed number?
A whole part plus a proper fraction (e.g. 7/3 = 2 1/3). Enable the checkbox to show the simplified result that way.
Is my input sent anywhere?
No. All calculation runs in your browser; nothing is sent to toco.tools servers.