There is no single standard here; sometimes, percentages are used (either volume or mass percentages; the numbers may be different for the same mixture, due to different densities); mass per volume (e.g., grams per liter); or moles per volume (e.g., moles per liter).
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Moles per litre, molL-1 and grams per litre, gL-1 are the most commonly used units, and are very easy to use when making measurements or conversions.
If you mean the units, the most commonly used units are degrees, and radians.
The kilogram is a unit of mass.
United States customary units are a system of measurements commonly used in the United States.
The answer will depend on the units that are used for the measurements: 12x32x22. There is nothing in the question to indicate whether they are inches or feet, yards or miles, or a mix of units, or even SI units.