438.67 is what percent of 550 - 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 550 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 550, so we can write it down as 100%=550.
4. We know, that x% equals 438.67 of the output value, so we can write it down as x%=438.67.
5. Now we have two simple equations:
1) 100%=550
2) x%=438.67
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%=550/438.67
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 438.67 is what percent of 550

100%/x%=550/438.67
(100/x)*x=(550/438.67)*x       - we multiply both sides of the equation by x
100=1.2537898648187*x       - we divide both sides of the equation by (1.2537898648187) to get x
100/1.2537898648187=x
79.758181818182=x
x=79.758181818182

now we have:
438.67 is 79.758181818182% of 550