What is 45 percent of 399 - step by step solution

Simple and best practice solution for 45% of 399. 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 399 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 399 is 100%, so we can write it down as 399=100%.
4. We know, that x is 45% of the output value, so we can write it down as x=45%.
5. Now we have two simple equations:
1) 399=100%
2) x=45%
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:
399/x=100%/45%
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 45% of 399

399/x=100/45
(399/x)*x=(100/45)*x       - we multiply both sides of the equation by x
399=2.22222222222*x       - we divide both sides of the equation by (2.22222222222) to get x
399/2.22222222222=x
179.55=x
x=179.55

now we have:
45% of 399=179.55

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