We can define percentage as a number or as a ratio which is a fraction of 100. In general, we can say percent is “per 100”. We can denote the percent by a symbol that is %. We can also say, percentages are used to express how small (or large) quantity related with large (or small). For example, we can read 20% as twenty percent. We can write this as (20/100).
We can find the percentage of a number by a formula that is
Percentage = (Given number/Total number) x 100.
Example 1: Find the percentage of math students out of 100 students if only 45 are from math department.
Solution:The total number of students = 100
The number of students from math department = 45
Percentage of math students = (Number of math students/ Total number of students) x 100
= (45/100) x 100
= 45 %
Hence the percentage of math students is 45%.
Example 2: Find the percentage of baby boys in a hospital is out of 50 children was born, if only 27 are baby boys.
Solution:The total number of children born in hospital = 50
The number of Children are boys = 27
Percentage of boy Children = (Number of Children are baby boys/ Total number of children born in hospital) x 100
= (27/50) x 100
= 27 x 2
Hence the percentage of baby boys is 54%.