309.45 is what percent of 2215 - 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 2215 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 2215, so we can write it down as 100%=2215.
4. We know, that x% equals 309.45 of the output value, so we can write it down as x%=309.45.
5. Now we have two simple equations:
1) 100%=2215
2) x%=309.45
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%=2215/309.45
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 309.45 is what percent of 2215

100%/x%=2215/309.45
(100/x)*x=(2215/309.45)*x       - we multiply both sides of the equation by x
100=7.1578607206334*x       - we divide both sides of the equation by (7.1578607206334) to get x
100/7.1578607206334=x
13.97065462754=x
x=13.97065462754

now we have:
309.45 is 13.97065462754% of 2215