Question

1. The ceiling was raised from 21m high and increased the ceiling by 5m. What is the percent increase

Answer 1

Since the ceiling was raised 5 m, then the new height is 21 + 5 = 26 m

Now, if the original height was the 100%, then using a rule of three, we have the following:

$\begin{gathered} 21m\rightarrow100\% \\ 26m\rightarrow x\% \\ \Rightarrow x=\frac{26\cdot100}{21}=\frac{2600}{21}=123.81 \\ x=123.81\% \end{gathered}$

we have that the new height is the 123.81% of the original height, therefore, the percent increase is 123.81-100=23.81%