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3 votes
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 ?

User MetalFrog
by
7.9k points

2 Answers

5 votes

Answer:

30

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 / 100 = 12 / 40

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

User Scout
by
8.2k points
1 vote

Answer:

30

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

User Alec Rooney
by
8.0k points

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