Simplify any ratio (12:8 to 3:2) or solve for the missing value in a proportion a:b = c:x. Free and instant.
Two modes: Simplify reduces any pair to its lowest form using the greatest common divisor, and Solve for X computes the missing term of a proportion with a step-by-step explanation.
A ratio compares two quantities (2:3), and a proportion states two ratios are equal (2:3 = 4:6). Scaling is just solving for the missing piece — the classic cross-multiplication:
a : b = c : x → x = (b × c) ÷ a
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Divide both numbers by their greatest common divisor. Example: 12:8 divided by 4 gives 3:2.
For a:b = c:x, x = (b x c) / a. The tool shows the full calculation.
Recipes, scaling designs, mixing solutions, odds and financial ratios like debt-to-equity.
The tool rounds to whole numbers for the simplified form; use Solve for X for decimal results.
For every a units of the first quantity there are b units of the second.
Yes, completely free with no account.