38.99 is what percent of 678 - 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 678 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 678, so we can write it down as 100%=678.
4. We know, that x% equals 38.99 of the output value, so we can write it down as x%=38.99.
5. Now we have two simple equations:
1) 100%=678
2) x%=38.99
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%=678/38.99
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 38.99 is what percent of 678

100%/x%=678/38.99
(100/x)*x=(678/38.99)*x       - we multiply both sides of the equation by x
100=17.38907412157*x       - we divide both sides of the equation by (17.38907412157) to get x
100/17.38907412157=x
5.7507374631268=x
x=5.7507374631268

now we have:
38.99 is 5.7507374631268% of 678