What is 5.1E-9 percent of 3.88 - 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 3.88 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 3.88 is 100%, so we can write it down as 3.88=100%.
4. We know, that x is 5.1E-9% of the output value, so we can write it down as x=5.1E-9%.
5. Now we have two simple equations:
1) 3.88=100%
2) x=5.1E-9%
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:
3.88/x=100%/5.1E-9%
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 5.1E-9% of 3.88

3.88/x=100/5.1E-9
(3.88/x)*x=(100/5.1E-9)*x       - we multiply both sides of the equation by x
3.88=19607843137.255*x       - we divide both sides of the equation by (19607843137.255) to get x
3.88/19607843137.255=x
1.9788E-10=x
x=1.9788E-10

now we have:
5.1E-9% of 3.88=1.9788E-10