Question

There are 12 students in a class who are performing at the school concert. This represents 40%of the class. How many students are in the class ?

Answer 1

Answer:

30

Step-by-step explanation:

Students performing in the school concert=40%

let the students in the class be x

hence 40% of the class=12

where 40%=40/100=4/10=2/5 and of means multiplication

(2/5)*x=12

multiplying both sides by 5/2

hence the equation becomes

x=12*5/2

x=60/2

x=30

so the total students in the class are 30

Answer 2

Answer:

30

Step-by-step explanation:

do u really need this Help?

but k... you know that 40% are 12 students.

and you need the number of the completely class.

$x \div 100 = 12 \div 40$

now you only have to solve this equation to x and you have the result 30.