Question

jonathans class has 30 boys. of the students in his class, 60% are girls. How many girls are in jonathans class?

Answer 1

Answer:

45

Step-by-step explanation:

60% are girls so remaining 40% will be boys

40%(Total) = 30

Total = 30*100/40 = 75

Girls = (6/10)*75 = 45

Answer 2

Answer:

☞Answer:

45

☞Given:

jonathans class has 30 boys. of the students in his class, 60% are girls.

☞To Find:

number of girls in jonathans class

☞Solution:

Let x = the number of total students in the class

Convert the percent into a decimal by moving the percent sign two places to the left and change the percent sign into a decimal point.

60% = 0.6

Then 0.6x = the number of girls in the class

Then 0.6x + 30 = the total number of students in the class

0.6x + 30 = x

Solve for x.

0.6x + 30 = x

0.6x = x - 30 <-- Subtract both sides by 30

-0.4x = -30 <-- Subtract both sides by x

x = 75

Now we have the total number of students in the class.

60 percent of the students are female.

0.6 * 75 = 45