Another, somewhat less often used, concentration unit is weight/volume percent (w/v %). It is defined as
For example, suppose we dissolve 1.2 g of NaCl in enough water to make 160 mL of (saline) solution, what is the w/v % of NaCl?
We interpret this number as 0.75 g of NaCl in 100 mL of solution. 500 mL of 0.75 w/v % NaCl soltuion would contaiin 0.75 x 5 g = 3.75 g of NaCl.