The best way to learn calculating percentages is by looking at a few real life examples.
Example1: The state of Georgia in the United States has a population of 10 million. If the population above 40 years of age is 2 million, what is the percentage of population above 40 years of age?
Solution:
Total Population = 10 million
Population above 40 years = 2 million
Fraction of population above 2 million = 2million/ 10 million = 1/5
Percentage of population above 2 million = fraction of population above 2 million . 100
= 1/5. 100 = 20%
This example suggests that the fraction of something or the percentage of something is very closely related. Let us try one more problem of a slightly complicated nature.
Calculate the percentage of population who are between the ages of 40 and 60(not including 40 and 60) given the following information.
- Total population is 10 million
- Population above 40 yrs is 6 million
- Population above 60 yrs is 2 million.
Solution:
This question is a little tricky as we have to calculate percentage of a range of ages.
Try it on your own and if you have any questions, connect to a tutor
