To solve this question, we need to use the following formula:
Percent by mass = (Mass of solute/mass of solute + mass of solvent) x 100%
mass of solution = mass of solvent + mass of solute
mass of solute = 98 g
mass of solution = 534 g
Percent by mass = (98/534) x 100%
Percent by mass = 18.4%
Answer: Percent by mass = 18.4%