80000 is what percent of 4.0E+20 - 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 4.0E+20 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 4.0E+20, so we can write it down as 100%=4.0E+20.
4. We know, that x% equals 80000 of the output value, so we can write it down as x%=80000.
5. Now we have two simple equations:
1) 100%=4.0E+20
2) x%=80000
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%=4.0E+20/80000
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 80000 is what percent of 4.0E+20

100%/x%=4.0E+20/80000
(100/x)*x=(4.0E+20/80000)*x       - we multiply both sides of the equation by x
100=5.0E+15*x       - we divide both sides of the equation by (5.0E+15) to get x
100/5.0E+15=x
2.0E-14=x
x=2.0E-14

now we have:
80000 is 2.0E-14% of 4.0E+20