If you have a class of 45 students and 15 are boys what is the percentage of boys in the class

15/45

Divide and multiply by 100

15/45 = 0.3333 = 33.33% are boys

45

if 20% of a # is 36,what is 50% of that #

To find the percentage of boys in the class, you need to divide the number of boys by the total number of students and then multiply by 100.

In this case, there are 15 boys in a class of 45 students.

To calculate the percentage of boys, you can use the following formula:

Percentage of boys = (Number of boys / Total number of students) x 100

Substituting the values, we get:

Percentage of boys = (15 / 45) x 100

Simplifying the expression:

Percentage of boys = 0.3333 x 100

Percentage of boys = 33.33%

Therefore, the percentage of boys in the class is approximately 33.33%.