Solve the Problem $1 \%$ Potassium How Much Potassium Is In Contains

Solve the problem.
-A chemical solution contains $1 \%$ potassium. How much potassium is in $2.5 \mathrm{~mL}$ of solution?

A) $0.25 \mathrm{~mL}$
B) $25 \mathrm{~mL}$
C) $250 \mathrm{~mL}$
D) $0.025 \mathrm{~mL}$