What is 2.5E+16 percent of 5.0E+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 5.0E+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 5.0E+15 is 100%, so we can write it down as 5.0E+15=100%.
4. We know, that x is 2.5E+16% of the output value, so we can write it down as x=2.5E+16%.
5. Now we have two simple equations:
1) 5.0E+15=100%
2) x=2.5E+16%
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:
5.0E+15/x=100%/2.5E+16%
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 2.5E+16% of 5.0E+15

5.0E+15/x=100/2.5E+16
(5.0E+15/x)*x=(100/2.5E+16)*x       - we multiply both sides of the equation by x
5.0E+15=4.0E-15*x       - we divide both sides of the equation by (4.0E-15) to get x
5.0E+15/4.0E-15=x
1.25E+30=x
x=1.25E+30

now we have:
2.5E+16% of 5.0E+15=1.25E+30