7.7 is what percent of 21000000000 - 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 21000000000 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 21000000000, so we can write it down as 100%=21000000000.
4. We know, that x% equals 7.7 of the output value, so we can write it down as x%=7.7.
5. Now we have two simple equations:
1) 100%=21000000000
2) x%=7.7
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%=21000000000/7.7
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 7.7 is what percent of 21000000000

100%/x%=21000000000/7.7
(100/x)*x=(21000000000/7.7)*x       - we multiply both sides of the equation by x
100=2727272727.2727*x       - we divide both sides of the equation by (2727272727.2727) to get x
100/2727272727.2727=x
3.6666666666667E-8=x
x=3.6666666666667E-8

now we have:
7.7 is 3.6666666666667E-8% of 21000000000