What is 13.7 percent of 128.87 - 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 128.87 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 128.87 is 100%, so we can write it down as 128.87=100%.
4. We know, that x is 13.7% of the output value, so we can write it down as x=13.7%.
5. Now we have two simple equations:
1) 128.87=100%
2) x=13.7%
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:
128.87/x=100%/13.7%
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 13.7% of 128.87

128.87/x=100/13.7
(128.87/x)*x=(100/13.7)*x       - we multiply both sides of the equation by x
128.87=7.2992700729927*x       - we divide both sides of the equation by (7.2992700729927) to get x
128.87/7.2992700729927=x
17.65519=x
x=17.65519

now we have:
13.7% of 128.87=17.65519