# Fraction Calculator

> Perform addition, subtraction, multiplication, and division with fractions.

Page: https://askcalculators.com/calculator/fraction-calculator/
Definition: https://askcalculators.com/calculator/fraction-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/fraction-calculator/schema.json
Version: 7.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/fraction-calculator/?n1=1&d1=2&n2=1&d2=3&operation=%2B

## Inputs
- n1: N1; type=number; optional; default=1
- d1: D1; type=number; optional; default=2
- n2: N2; type=number; optional; default=1
- d2: D2; type=number; optional; default=3
- operation: Operation; type=text; optional; default=+

## Outputs
- result: Result; format=text; primary

## Formula
Fractions are combined by the selected operation using common denominators; numerator and denominator are reduced by their greatest common divisor.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.