The depth was 64 feet. Currently, the depth is 80 feet. The depth increased by 25%
Solution:
Given, The depth was 64 feet.
Currently, the depth is 80 feet.
We have to find by what percent has the depth increased
The percentage increase is given as:
[tex]\text { percent increase }=\frac{\text { change in the depth }}{\text { original depth }} \times 100 \%[/tex]
Here original depth = 64
Final depth = 80
Change in depth = final depth - original depth = 80 - 64 = 16
Plugging in values in formula we get,
[tex]\begin{array}{l}{\text { Percent increase in depth }=\frac{80-64}{64} \times 100 \%} \\\\ {=\frac{16}{64} \times 100 \%} \\\\ {=\frac{1}{4} \times 100 \%=25 \%} \\\\ {\text { Hence, the depth increased by } 25 \% .}\end{array}[/tex]
