86 is what percent of 3900 - 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 3900 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 3900, so we can write it down as 100%=3900.
4. We know, that x% equals 86 of the output value, so we can write it down as x%=86.
5. Now we have two simple equations:
1) 100%=3900
2) x%=86
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%=3900/86
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 86 is what percent of 3900

100%/x%=3900/86
(100/x)*x=(3900/86)*x       - we multiply both sides of the equation by x
100=45.348837209302*x       - we divide both sides of the equation by (45.348837209302) to get x
100/45.348837209302=x
2.2051282051282=x
x=2.2051282051282

now we have:
86 is 2.2051282051282% of 3900