What is 25000 percent of 2.1E-5 - 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 2.1E-5 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 2.1E-5 is 100%, so we can write it down as 2.1E-5=100%.
4. We know, that x is 25000% of the output value, so we can write it down as x=25000%.
5. Now we have two simple equations:
1) 2.1E-5=100%
2) x=25000%
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:
2.1E-5/x=100%/25000%
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 25000% of 2.1E-5

2.1E-5/x=100/25000
(2.1E-5/x)*x=(100/25000)*x       - we multiply both sides of the equation by x
2.1E-5=0.004*x       - we divide both sides of the equation by (0.004) to get x
2.1E-5/0.004=x
0.00525=x
x=0.00525

now we have:
25000% of 2.1E-5=0.00525