To start with
Let us write out the given parameters
[tex]\text{Pay rise= \$3,000}[/tex]Now, let us imagine that the starting salary is x
Therefore, the new salary after the pay rise will be
[tex]3000+x[/tex]Using the formula to calculate the percentage change, we will have
[tex]\begin{gathered} \text{percentage change=}\frac{change\text{ in amount}}{starting\text{ amount}}\times100\text{ \%} \\ or \\ \text{percentage change=}\frac{\text{pay rise}}{starting\text{ amount}}\times100\text{ \%} \end{gathered}[/tex]Computing the values, we will have
[tex]\text{Percentage change=}\frac{3000}{x}\times100\text{ \%}[/tex]Thus, we will have
[tex]\begin{gathered} \text{percentage change=}\frac{300000}{x}\text{\%} \\ \\ \text{where x= starting salary} \end{gathered}[/tex]