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

Answer:

There are 30 students in class

Step-by-step 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

$\frac{0.40x}{0.40} = \frac{12}{0.40}\\x = 30$

Hence,

There are 30 students in class