Question

Suppose a city has 810 high-rise buildings, and 29 of these buildings have rooftop gardens. Find the percentage of high-rise buildings with rooftop gardens in this city. Round your answer to the nearest tenth of a percent.

Answer 1

For this case we can make the following rule of three:
810 ---------> 100%
29 -----------> x
From here, we clear the value of x.
We have then:
x = (29/810) * (100)
x = 3.580246914%
Round to the nearest tenth of a percent:
x = 3.6%
Answer:
The percentage of high-rise buildings with rooftop gardens in this city is:
x = 3.6%