What is 9 percent of 30 - step by step solution

Simple and best practice solution for 9% of 30. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

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To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 30 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 30 is 100%, so we can write it down as 30=100%.
4. We know, that x is 9% of the output value, so we can write it down as x=9%.
5. Now we have two simple equations:
1) 30=100%
2) x=9%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
30/x=100%/9%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 9% of 30

30/x=100/9
(30/x)*x=(100/9)*x       - we multiply both sides of the equation by x
30=11.1111111111*x       - we divide both sides of the equation by (11.1111111111) to get x
30/11.1111111111=x
2.7=x
x=2.7

now we have:
9% of 30=2.7

 

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