21 is what percent of 19681 - 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 19681 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 19681, so we can write it down as 100%=19681.
4. We know, that x% equals 21 of the output value, so we can write it down as x%=21.
5. Now we have two simple equations:
1) 100%=19681
2) x%=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:
100%/x%=19681/21
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21 is what percent of 19681

100%/x%=19681/21
(100/x)*x=(19681/21)*x       - we multiply both sides of the equation by x
100=937.19047619048*x       - we divide both sides of the equation by (937.19047619048) to get x
100/937.19047619048=x
0.1067018952289=x
x=0.1067018952289

now we have:
21 is 0.1067018952289% of 19681