What is 19000000 percent of 21000000000 - 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 21000000000 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 21000000000 is 100%, so we can write it down as 21000000000=100%.
4. We know, that x is 19000000% of the output value, so we can write it down as x=19000000%.
5. Now we have two simple equations:
1) 21000000000=100%
2) x=19000000%
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:
21000000000/x=100%/19000000%
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 19000000% of 21000000000

21000000000/x=100/19000000
(21000000000/x)*x=(100/19000000)*x       - we multiply both sides of the equation by x
21000000000=5.2631578947368E-6*x       - we divide both sides of the equation by (5.2631578947368E-6) to get x
21000000000/5.2631578947368E-6=x
3.99E+15=x
x=3.99E+15

now we have:
19000000% of 21000000000=3.99E+15