121.45 is what percent of 156.72 - 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 156.72 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 156.72, so we can write it down as 100%=156.72.
4. We know, that x% equals 121.45 of the output value, so we can write it down as x%=121.45.
5. Now we have two simple equations:
1) 100%=156.72
2) x%=121.45
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%=156.72/121.45
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 121.45 is what percent of 156.72

100%/x%=156.72/121.45
(100/x)*x=(156.72/121.45)*x       - we multiply both sides of the equation by x
100=1.2904075751338*x       - we divide both sides of the equation by (1.2904075751338) to get x
100/1.2904075751338=x
77.494895354773=x
x=77.494895354773

now we have:
121.45 is 77.494895354773% of 156.72