What is 0.7 percent of 123.9 - step by step solution

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

1. We assume, that the number 123.9 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 123.9 is 100%, so we can write it down as 123.9=100%.
4. We know, that x is 0.7% of the output value, so we can write it down as x=0.7%.
5. Now we have two simple equations:
1) 123.9=100%
2) x=0.7%
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:
123.9/x=100%/0.7%
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 0.7% of 123.9

123.9/x=100/0.7
(123.9/x)*x=(100/0.7)*x       - we multiply both sides of the equation by x
123.9=142.85714285714*x       - we divide both sides of the equation by (142.85714285714) to get x
123.9/142.85714285714=x
0.8673=x
x=0.8673

now we have:
0.7% of 123.9=0.8673