The percentage change in the Amy’s hourly rate is 15 %.
Solution:
Given, Amy earns £10.00 per hour.
She gets a raise, and her new hourly rate is £11.50
We have to find what is the percentage change in her hourly rate?
The percentage change is given as:
![\text { Percentage change }=\frac{\text { change in the value }}{\text { original value }} * 100 \%](https://img.qammunity.org/2020/formulas/mathematics/middle-school/fi108c2mclhlb6q1d1t2dkaw4u9gaj77e8.png)
Here original value = 10
Final value = 11.50
Change in value = Final value – Original value
Change in value = 11.50 – 10 = 1.5
Plugging in the values in formula we get,
![\begin{array}{l}{\text { Percentage change }=(1.5)/(10) * 100 \%} \\\\ {=1.5 * 10 \%=15 \%}\end{array}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9tlcmilb5fll31ksthqx1afr0ajd40gbwx.png)
Hence, the percentage change in the Amy’s hourly rate is 15 %.