17.2 is what percent of 55 - 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 55 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 55, so we can write it down as 100%=55.
4. We know, that x% equals 17.2 of the output value, so we can write it down as x%=17.2.
5. Now we have two simple equations:
1) 100%=55
2) x%=17.2
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%=55/17.2
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 17.2 is what percent of 55

100%/x%=55/17.2
(100/x)*x=(55/17.2)*x       - we multiply both sides of the equation by x
100=3.1976744186047*x       - we divide both sides of the equation by (3.1976744186047) to get x
100/3.1976744186047=x
31.272727272727=x
x=31.272727272727

now we have:
17.2 is 31.272727272727% of 55