121.5 is what percent of 161 - 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 161 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 161, so we can write it down as 100%=161.
4. We know, that x% equals 121.5 of the output value, so we can write it down as x%=121.5.
5. Now we have two simple equations:
1) 100%=161
2) x%=121.5
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%=161/121.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 121.5 is what percent of 161

100%/x%=161/121.5
(100/x)*x=(161/121.5)*x       - we multiply both sides of the equation by x
100=1.3251028806584*x       - we divide both sides of the equation by (1.3251028806584) to get x
100/1.3251028806584=x
75.465838509317=x
x=75.465838509317

now we have:
121.5 is 75.465838509317% of 161