5 is what percent of 4.2E+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 4.2E+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 4.2E+15, so we can write it down as 100%=4.2E+15.
4. We know, that x% equals 5 of the output value, so we can write it down as x%=5.
5. Now we have two simple equations:
1) 100%=4.2E+15
2) x%=5
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%=4.2E+15/5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 5 is what percent of 4.2E+15

100%/x%=4.2E+15/5
(100/x)*x=(4.2E+15/5)*x       - we multiply both sides of the equation by x
100=8.4E+14*x       - we divide both sides of the equation by (8.4E+14) to get x
100/8.4E+14=x
1.1904761904762E-13=x
x=1.1904761904762E-13

now we have:
5 is 1.1904761904762E-13% of 4.2E+15