221.58 is what percent of 243 - 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 243 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 243, so we can write it down as 100%=243.
4. We know, that x% equals 221.58 of the output value, so we can write it down as x%=221.58.
5. Now we have two simple equations:
1) 100%=243
2) x%=221.58
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%=243/221.58
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 221.58 is what percent of 243

100%/x%=243/221.58
(100/x)*x=(243/221.58)*x       - we multiply both sides of the equation by x
100=1.0966693744923*x       - we divide both sides of the equation by (1.0966693744923) to get x
100/1.0966693744923=x
91.185185185185=x
x=91.185185185185

now we have:
221.58 is 91.185185185185% of 243