The depth of a lake in Centerville changes over time due to rainfall and evaporation. A few months ago, the depth was 75 feet. Currently, the lake is 24% less deep. What is this year's depth?
Mathematics · Middle School · Tue Nov 03 2020
Answered on
Given:
Depth of lake = 75 feet
Current Depth is 24% less
Solution:
In order to identify the current depth of the lake, we take the 24% of 75 feet, then subtract the answer to 75 feet. In order to take the 24% value of 75, it must be first changed into decimal form. In order to change a percentage into decimal form, divide the percentage by 100, hence in changing a decimal into percentage, multiply the decimal by 100.
=24/100
=0.24
=(0.24)(75)
=18 feet
Subtract 75 feet by 18 feet to determine the current year's depth.
= 75 - 18
= 57 feet