To start with
Let us write out the given parameters
![\text{Pay rise= \$3,000}](https://img.qammunity.org/2023/formulas/mathematics/college/lr1jm5zby36i2g9ljc0zz87cl0v71anfwo.png)
Now, let us imagine that the starting salary is x
Therefore, the new salary after the pay rise will be
![3000+x](https://img.qammunity.org/2023/formulas/mathematics/college/9g650zvl51a68hnrx0eoh4acq778saw3lf.png)
Using the formula to calculate the percentage change, we will have
![\begin{gathered} \text{percentage change=}\frac{change\text{ in amount}}{starting\text{ amount}}*100\text{ \%} \\ or \\ \text{percentage change=}\frac{\text{pay rise}}{starting\text{ amount}}*100\text{ \%} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ap411lm06kivs0d6gpytmz6gtw04eskpmn.png)
Computing the values, we will have
![\text{Percentage change=}(3000)/(x)*100\text{ \%}](https://img.qammunity.org/2023/formulas/mathematics/college/vh80qsr46tro8vki51857anxx2p7gzz4qo.png)
Thus, we will have
![\begin{gathered} \text{percentage change=}(300000)/(x)\text{\%} \\ \\ \text{where x= starting salary} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ct25zuc5wh15in50os0v7krznalejjd5cj.png)