81.3 is what percent of 890 - 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 890 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 890, so we can write it down as 100%=890.
4. We know, that x% equals 81.3 of the output value, so we can write it down as x%=81.3.
5. Now we have two simple equations:
1) 100%=890
2) x%=81.3
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%=890/81.3
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 81.3 is what percent of 890

100%/x%=890/81.3
(100/x)*x=(890/81.3)*x       - we multiply both sides of the equation by x
100=10.947109471095*x       - we divide both sides of the equation by (10.947109471095) to get x
100/10.947109471095=x
9.1348314606742=x
x=9.1348314606742

now we have:
81.3 is 9.1348314606742% of 890