What is 40 percent of 123 - step by step solution

Simple and best practice solution for 40% of 123. 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 123 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 123 is 100%, so we can write it down as 123=100%.
4. We know, that x is 40% of the output value, so we can write it down as x=40%.
5. Now we have two simple equations:
1) 123=100%
2) x=40%
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:
123/x=100%/40%
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 40% of 123

123/x=100/40
(123/x)*x=(100/40)*x - we multiply both sides of the equation by x
123=2.5*x - we divide both sides of the equation by (2.5) to get x
123/2.5=x
49.2=x
x=49.2

now we have:
40% of 123=49.2

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