Question

In a class of 30 students, 13 of them are boys. What percentage of the class are girls? Give your answer to 1 decimal place.​

Answer 1

Answer: 56.7%

Explanation:

1) First we need to find the number of girls out of the class of 30:

30-13 = 17 -> 17 girls in the class

2) Then we can set up a part-whole equation like this (I don't know if this is how you learned it, I recommend searching up "part whole percent" if you're confused):

`(17)/(30) (x)/(100)` it follows this template:
`(part)/(whole) (percent)/(100)`

Since we're trying to find the percent and the problem gives us the rest of the info (by the way, that 100 will always stay there, it will never change)

3) Then we cross multiply

17 x 100 = 1700

1700/30 = 56.6666666

4) And since the answer has to be in the 1 decimal place, it would be 56.7

So that means approximately 56.7% of the class are girls