What is 400000000 percent of 7 - 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 7 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 7 is 100%, so we can write it down as 7=100%.
4. We know, that x is 400000000% of the output value, so we can write it down as x=400000000%.
5. Now we have two simple equations:
1) 7=100%
2) x=400000000%
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:
7/x=100%/400000000%
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 400000000% of 7

7/x=100/400000000
(7/x)*x=(100/400000000)*x       - we multiply both sides of the equation by x
7=2.5E-7*x       - we divide both sides of the equation by (2.5E-7) to get x
7/2.5E-7=x
28000000=x
x=28000000

now we have:
400000000% of 7=28000000