What is 13.81 percent of 31.87 - 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 31.87 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 31.87 is 100%, so we can write it down as 31.87=100%.
4. We know, that x is 13.81% of the output value, so we can write it down as x=13.81%.
5. Now we have two simple equations:
1) 31.87=100%
2) x=13.81%
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:
31.87/x=100%/13.81%
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 13.81% of 31.87

31.87/x=100/13.81
(31.87/x)*x=(100/13.81)*x       - we multiply both sides of the equation by x
31.87=7.2411296162201*x       - we divide both sides of the equation by (7.2411296162201) to get x
31.87/7.2411296162201=x
4.401247=x
x=4.401247

now we have:
13.81% of 31.87=4.401247