There are several ways to express the concentration of solutions. They can be expressed in terms of fraction or percent, in terms of moles or mass for a given mole, mass or volume of solution.
Mass percent is the relationship between the mass of the solute and the mass of the solvent multiplied by 100%. Without multiplying the ratio by 100%, the mass fraction of the solution is obtained.
*Mass percent = mass of solute x 100%
mass of solution