10 gram of peppermint powder added in 100 ml of methanol and left for maceration for a week. After that it was filtered and dried again completely to evaporate methanol now dried mint processed in methanol was obtained. The question was asked that how much DMSO required to be added to reconstitute MMM( Macerated Mint Methanol) powder to make final concentration of 200 mg / ml.

Moreover, question is related to adjustment of concentration according to % w/v.