21.72 is what percent of 30.06 - 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 30.06 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 30.06, so we can write it down as 100%=30.06.
4. We know, that x% equals 21.72 of the output value, so we can write it down as x%=21.72.
5. Now we have two simple equations:
1) 100%=30.06
2) x%=21.72
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%=30.06/21.72
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.72 is what percent of 30.06

100%/x%=30.06/21.72
(100/x)*x=(30.06/21.72)*x       - we multiply both sides of the equation by x
100=1.3839779005525*x       - we divide both sides of the equation by (1.3839779005525) to get x
100/1.3839779005525=x
72.255489021956=x
x=72.255489021956

now we have:
21.72 is 72.255489021956% of 30.06