Ratio Calculator
Simplify ratios and solve for missing values in proportions.
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Simplify Ratio
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Solve Proportion (A:B = C:D)
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Frequently Asked Questions
How do I simplify a ratio?
Divide both numbers by their greatest common divisor (GCD). For example, 8:12 simplifies to 2:3.
What is a proportion?
A proportion states that two ratios are equal: A/B = C/D. If you know three values, you can solve for the fourth.