What is 500000000 percent of 0.8 - 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 0.8 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 0.8 is 100%, so we can write it down as 0.8=100%.
4. We know, that x is 500000000% of the output value, so we can write it down as x=500000000%.
5. Now we have two simple equations:
1) 0.8=100%
2) x=500000000%
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:
0.8/x=100%/500000000%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 500000000% of 0.8

0.8/x=100/500000000
(0.8/x)*x=(100/500000000)*x       - we multiply both sides of the equation by x
0.8=2.0E-7*x       - we divide both sides of the equation by (2.0E-7) to get x
0.8/2.0E-7=x
4000000=x
x=4000000

now we have:
500000000% of 0.8=4000000