What is 1.0E+21 percent of 1.2938473432479E+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 1.2938473432479E+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 1.2938473432479E+15 is 100%, so we can write it down as 1.2938473432479E+15=100%.
4. We know, that x is 1.0E+21% of the output value, so we can write it down as x=1.0E+21%.
5. Now we have two simple equations:
1) 1.2938473432479E+15=100%
2) x=1.0E+21%
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:
1.2938473432479E+15/x=100%/1.0E+21%
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 1.0E+21% of 1.2938473432479E+15

1.2938473432479E+15/x=100/1.0E+21
(1.2938473432479E+15/x)*x=(100/1.0E+21)*x       - we multiply both sides of the equation by x
1.2938473432479E+15=1.0E-19*x       - we divide both sides of the equation by (1.0E-19) to get x
1.2938473432479E+15/1.0E-19=x
1.2938473432479E+34=x
x=1.2938473432479E+34

now we have:
1.0E+21% of 1.2938473432479E+15=1.2938473432479E+34