The Solution to Question 2:
Given that Alex bought:
old phone price = $125
new phone price = $200
We asked to find the percent increase in the prices of the phones.
To calculate the required percent increase, we shall use the formula below:
[tex]\text{ percent Increase =}\frac{\text{ change in price}}{\text{old phone price}}\times100[/tex][tex]\begin{gathered} \text{ percent increase = }\frac{200-125}{125}\times100 \\ \\ =\frac{75}{125}\times100=60\text{\%} \end{gathered}[/tex]
Therefore, the correct answer is 60%
