300 is what percent of 3.0E+15 - 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 3.0E+15 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 3.0E+15, so we can write it down as 100%=3.0E+15.
4. We know, that x% equals 300 of the output value, so we can write it down as x%=300.
5. Now we have two simple equations:
1) 100%=3.0E+15
2) x%=300
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%=3.0E+15/300
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 300 is what percent of 3.0E+15

100%/x%=3.0E+15/300
(100/x)*x=(3.0E+15/300)*x       - we multiply both sides of the equation by x
100=10000000000000*x       - we divide both sides of the equation by (10000000000000) to get x
100/10000000000000=x
1.0E-11=x
x=1.0E-11

now we have:
300 is 1.0E-11% of 3.0E+15