The Answer is 15% .
It can be clearly observed that the gram is the unit of mass and millilitre is the unit of volume hence for the sake of ease of calculation us consider the solvent is water.
Taking this consideration we can conclude that density
[tex]\rho = \dfrac{mass }{volume}[/tex]
since the value for density of water = 1 g/cm^3
Considering 1000 mL = 1000 g for water
So the percentage chance of 150 gram active solution = 150 /1000 = 15%
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