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navik [9.2K]
3 years ago
7

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

e in the class ?
Mathematics
2 answers:
Fiesta28 [93]3 years ago
7 0

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

Marianna [84]3 years ago
3 0

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.

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