percentage solution

Percentage solution may refer to:

• Mass fraction (or "% w/w" or "wt.%"), for percent mass
• Volume fraction (or "% v/v" or "vol.%"), volume concentration, for percent volume
• "Mass/volume percentage" (or "% m/v") in biology, for mass per unit volume; incorrectly used to denote mass concentration (chemistry). See usage in biology

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