a:b
Ratio Calculator
Simplify a ratio, scale it, or solve A : B = C : D for the missing value.
Result…
How it's calculated
A : B = C : D ⇔ A × D = B × C Share of A = total × A ÷ (A + B)
Equivalent ratios scale both sides by the same factor. Splitting in a ratio divides the amount into A + B equal parts.
Your numbers, step by step
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