Answer:
22.97
Explanation:
Given that,
Initial temperature = 74°
After some time, the new temperature = 91°
We need to find the percent increase in the temperature.
The formula for the percentage increase is given by :
![\%=\frac{|\text{final value-initial value}|}{\text{initial value}}* 100\\\\=(91-74)/(74)*100\\\\=22.97\%](https://img.qammunity.org/2022/formulas/mathematics/college/jx0bt2wkc01wr3edum131tyghmwjalmlq1.png)
So, the increase in temperature is 22.97%.