The numbers is on the screen and the question is what is the percent increase

The percent is represented by the following expression:
[tex]\text{Total}\cdot\frac{\text{percent}}{100}=Equivalent\text{ number to the percent}[/tex]We know that the original length was 21 ft, it increased 5 ft. What percent is 5ft of 21ft?
[tex]21\cdot\frac{\text{percent}}{100}=5[/tex]Solve for the percent variable:
[tex]\begin{gathered} \text{percent}=\frac{5\cdot100}{21} \\ \text{percent}=23.81\text{ } \end{gathered}[/tex]It increases 23.81%