Answer: 60%
Explanation:
Given: Climbing rate at the end of week 1 = 25 steps per minute.
Climbing rate at the end of week 4 = 60 steps per minute
The percent increase in Maggie's rate of climbing steps from the end of week 1 to the end of week 4 will be :
![=(40-25)/(25)*100\\\\=(15)/(25)*100=15*4=60\%](https://img.qammunity.org/2021/formulas/mathematics/high-school/40fm7w1dqbb3644ra7zz99og82aoqgikef.png)
Hence, the percent increase in Maggie's rate of climbing steps from the end of week 1 to the end of week 4 = 60%