5 is what percent of 3.999 - 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 3.999 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% equals 3.999, so we can write it down as 100%=3.999.
4. We know, that x% equals 5 of the output value, so we can write it down as x%=5.
5. Now we have two simple equations:
1) 100%=3.999
2) x%=5
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%=3.999/5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 5 is what percent of 3.999

100%/x%=3.999/5
(100/x)*x=(3.999/5)*x       - we multiply both sides of the equation by x
100=0.7998*x       - we divide both sides of the equation by (0.7998) to get x
100/0.7998=x
125.03125781445=x
x=125.03125781445

now we have:
5 is 125.03125781445% of 3.999