Answer:
This problem involves the very basic formula of representing the total by a variable N. The number of boys plus the number of girls is equal to N but the number of girls is 36% of N.
Writing the representations
N = number of boys + number of girls
N = 48 + 36% of N
N = 0.36N + 48
N - 0.36N = 48
0.64N = 48
N = 48 / 0.64
N = 75
There are 75 people in the class. The number of boys is 48 and the number of girls is 27. The percentage of girls is 36% of 75.
