annual salary = $51,605
we have 52 weeks in a year
[tex]\begin{gathered} 52\text{weeks}=51,605 \\ 2\text{weeks}=x \end{gathered}[/tex]note: biweekly is equivalent to 2 weeks
now, let's cross multiply both sides and solve for x
[tex]\begin{gathered} 52=51605 \\ 2=x \\ 52\times x=51605\times2 \\ 52x=103,210 \end{gathered}[/tex]divide both sides by 52 to solve for x
[tex]\begin{gathered} 52x=103210 \\ \frac{52x}{52}=\frac{103210}{52} \\ x=1984.808 \end{gathered}[/tex]the approximate biweekly pay is $1984.81