What is 57 percent of 687 - 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 687 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 687 is 100%, so we can write it down as 687=100%.
4. We know, that x is 57% of the output value, so we can write it down as x=57%.
5. Now we have two simple equations:
1) 687=100%
2) x=57%
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:
687/x=100%/57%
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 57% of 687

687/x=100/57
(687/x)*x=(100/57)*x       - we multiply both sides of the equation by x
687=1.7543859649123*x       - we divide both sides of the equation by (1.7543859649123) to get x
687/1.7543859649123=x
391.59=x
x=391.59

now we have:
57% of 687=391.59