As a water quality assurance employee for local aqua america, inc branch record a drop in water levels from 28 feet to 7 feet at your reservoir. what is your percentage decrease?

Percentage decrease in the reservoir level is 75%.

Step-by-step explanation:

Initial level of the water in the reservoir was recorded = 28 feet

Level of water at the reservoir after the drop = 7 feet

Decrease in the water level = (28 - 7) = 21 feet

Now to calculate the percentage drop we will apply the formula,

Percentage change =

=

= 75%

Percentage decrease in the reservoir level is 75%.

were is the equation