15.86 is what percent of 39.65 - 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 39.65 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 39.65, so we can write it down as 100%=39.65.
4. We know, that x% equals 15.86 of the output value, so we can write it down as x%=15.86.
5. Now we have two simple equations:
1) 100%=39.65
2) x%=15.86
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%=39.65/15.86
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 15.86 is what percent of 39.65

100%/x%=39.65/15.86
(100/x)*x=(39.65/15.86)*x       - we multiply both sides of the equation by x
100=2.5*x       - we divide both sides of the equation by (2.5) to get x
100/2.5=x
40=x
x=40

now we have:
15.86 is 40% of 39.65