2 is what percent of 1.0E+18 - 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 1.0E+18 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 1.0E+18, so we can write it down as 100%=1.0E+18.
4. We know, that x% equals 2 of the output value, so we can write it down as x%=2.
5. Now we have two simple equations:
1) 100%=1.0E+18
2) x%=2
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%=1.0E+18/2
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 2 is what percent of 1.0E+18

100%/x%=1.0E+18/2
(100/x)*x=(1.0E+18/2)*x       - we multiply both sides of the equation by x
100=5.0E+17*x       - we divide both sides of the equation by (5.0E+17) to get x
100/5.0E+17=x
2.0E-16=x
x=2.0E-16

now we have:
2 is 2.0E-16% of 1.0E+18