What is 99.9991 percent of 100 - 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 100 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 100 is 100%, so we can write it down as 100=100%.
4. We know, that x is 99.9991% of the output value, so we can write it down as x=99.9991%.
5. Now we have two simple equations:
1) 100=100%
2) x=99.9991%
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:
100/x=100%/99.9991%
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 99.9991% of 100

100/x=100/99.9991
(100/x)*x=(100/99.9991)*x       - we multiply both sides of the equation by x
100=1.000009000081*x       - we divide both sides of the equation by (1.000009000081) to get x
100/1.000009000081=x
99.9991=x
x=99.9991

now we have:
99.9991% of 100=99.9991