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Ratio Calculator
Simplify a general ratio, compare its decimal value, and scale it to a target.
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Aspect Ratio Calculator
Calculate, simplify, and resize dimensions while preserving an aspect ratio.
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Percentage Change Calculator
Calculate percentage increase or decrease and the absolute difference.
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Rule of Three Calculator
Solve the simple proportional relationship A : B = C : X.
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Age Calculator
Calculate age in years, months, days, and total days between two dates.