Question

there are 12 students in a class who are preforming at the school concert . this represents 40% of the class how many students are in the class?

Answer 1

There are 30 students in class

Explanation:

Let x be the total number of students

Then according to the given statement,

40% of x is 12

this can be expressed mathematically as:

`12 = 40\%\ of\ x\\12 = 0.40 * x`

we can simply use this equation to find the total number of students

`12 = 0.40x`

Dividing both sides by 0.40

`(0.40x)/(0.40) = (12)/(0.40)\\x = 30`

Hence,

There are 30 students in class