What is 30 percent of 12.689 - step by step solution

Simple and best practice solution for 30% of 12.689. 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 12.689 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 12.689 is 100%, so we can write it down as 12.689=100%.
4. We know, that x is 30% of the output value, so we can write it down as x=30%.
5. Now we have two simple equations:
1) 12.689=100%
2) x=30%
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:
12.689/x=100%/30%
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 30% of 12.689

12.689/x=100/30
(12.689/x)*x=(100/30)*x       - we multiply both sides of the equation by x
12.689=3.3333333333333*x       - we divide both sides of the equation by (3.3333333333333) to get x
12.689/3.3333333333333=x
3.8067=x
x=3.8067

now we have:
30% of 12.689=3.8067

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