What is 87 percent of 89 - 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 89 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 89 is 100%, so we can write it down as 89=100%.
4. We know, that x is 87% of the output value, so we can write it down as x=87%.
5. Now we have two simple equations:
1) 89=100%
2) x=87%
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:
89/x=100%/87%
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 87% of 89

89/x=100/87
(89/x)*x=(100/87)*x       - we multiply both sides of the equation by x
89=1.1494252873563*x       - we divide both sides of the equation by (1.1494252873563) to get x
89/1.1494252873563=x
77.43=x
x=77.43

now we have:
87% of 89=77.43