128.2 is what percent of 163.4 - 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 163.4 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 163.4, so we can write it down as 100%=163.4.
4. We know, that x% equals 128.2 of the output value, so we can write it down as x%=128.2.
5. Now we have two simple equations:
1) 100%=163.4
2) x%=128.2
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%=163.4/128.2
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 128.2 is what percent of 163.4

100%/x%=163.4/128.2
(100/x)*x=(163.4/128.2)*x       - we multiply both sides of the equation by x
100=1.2745709828393*x       - we divide both sides of the equation by (1.2745709828393) to get x
100/1.2745709828393=x
78.457772337821=x
x=78.457772337821

now we have:
128.2 is 78.457772337821% of 163.4