What is 9.9 percent of 122.9 - step by step solution

Simple and best practice solution for 9.9% of 122.9. 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 122.9 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 122.9 is 100%, so we can write it down as 122.9=100%.
4. We know, that x is 9.9% of the output value, so we can write it down as x=9.9%.
5. Now we have two simple equations:
1) 122.9=100%
2) x=9.9%
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:
122.9/x=100%/9.9%
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 9.9% of 122.9

122.9/x=100/9.9
(122.9/x)*x=(100/9.9)*x       - we multiply both sides of the equation by x
122.9=10.10101010101*x       - we divide both sides of the equation by (10.10101010101) to get x
122.9/10.10101010101=x
12.1671=x
x=12.1671

now we have:
9.9% of 122.9=12.1671

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