# Ratio Calculator

> Simplify an integer ratio and optionally scale it from a new first value.

Page: https://askcalculators.com/calculator/ratio-calculator/
Definition: https://askcalculators.com/calculator/ratio-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/ratio-calculator/schema.json
Version: 1.0.0
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/ratio-calculator/?a=12&b=18

## Inputs
- a: First value; type=number; required; default=12; min=1; max=1000000000
- b: Second value; type=number; required; default=18; min=1; max=1000000000
- scaledA: New first value; type=number; optional; min=0

## Outputs
- simplifiedRatio: Simplified ratio; format=text; primary
- greatestCommonDivisor: Greatest common divisor; format=integer
- decimal: First ÷ second; format=number
- percent: First as percent of second; format=percent
- scaledB: Matching second value; format=number

## Formula
Simplified ratio = (a ÷ GCD) : (b ÷ GCD)

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