121.8 is what percent of 300 - 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 300 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 300, so we can write it down as 100%=300.
4. We know, that x% equals 121.8 of the output value, so we can write it down as x%=121.8.
5. Now we have two simple equations:
1) 100%=300
2) x%=121.8
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%=300/121.8
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 121.8 is what percent of 300

100%/x%=300/121.8
(100/x)*x=(300/121.8)*x       - we multiply both sides of the equation by x
100=2.4630541871921*x       - we divide both sides of the equation by (2.4630541871921) to get x
100/2.4630541871921=x
40.6=x
x=40.6

now we have:
121.8 is 40.6% of 300