21.1 is what percent of 258000000 - 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 258000000 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 258000000, so we can write it down as 100%=258000000.
4. We know, that x% equals 21.1 of the output value, so we can write it down as x%=21.1.
5. Now we have two simple equations:
1) 100%=258000000
2) x%=21.1
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%=258000000/21.1
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.1 is what percent of 258000000

100%/x%=258000000/21.1
(100/x)*x=(258000000/21.1)*x       - we multiply both sides of the equation by x
100=12227488.151659*x       - we divide both sides of the equation by (12227488.151659) to get x
100/12227488.151659=x
8.1782945736434E-6=x
x=8.1782945736434E-6

now we have:
21.1 is 8.1782945736434E-6% of 258000000