0.39 is what percent of 21.38 - 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 21.38 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 21.38, so we can write it down as 100%=21.38.
4. We know, that x% equals 0.39 of the output value, so we can write it down as x%=0.39.
5. Now we have two simple equations:
1) 100%=21.38
2) x%=0.39
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%=21.38/0.39
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 0.39 is what percent of 21.38

100%/x%=21.38/0.39
(100/x)*x=(21.38/0.39)*x       - we multiply both sides of the equation by x
100=54.820512820513*x       - we divide both sides of the equation by (54.820512820513) to get x
100/54.820512820513=x
1.8241347053321=x
x=1.8241347053321

now we have:
0.39 is 1.8241347053321% of 21.38