28.9 is what percent of 213 - 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 213 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 213, so we can write it down as 100%=213.
4. We know, that x% equals 28.9 of the output value, so we can write it down as x%=28.9.
5. Now we have two simple equations:
1) 100%=213
2) x%=28.9
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%=213/28.9
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 28.9 is what percent of 213

100%/x%=213/28.9
(100/x)*x=(213/28.9)*x       - we multiply both sides of the equation by x
100=7.3702422145329*x       - we divide both sides of the equation by (7.3702422145329) to get x
100/7.3702422145329=x
13.568075117371=x
x=13.568075117371

now we have:
28.9 is 13.568075117371% of 213