19.5 is what percent of 387 - 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 387 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 387, so we can write it down as 100%=387.
4. We know, that x% equals 19.5 of the output value, so we can write it down as x%=19.5.
5. Now we have two simple equations:
1) 100%=387
2) x%=19.5
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%=387/19.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 19.5 is what percent of 387

100%/x%=387/19.5
(100/x)*x=(387/19.5)*x       - we multiply both sides of the equation by x
100=19.846153846154*x       - we divide both sides of the equation by (19.846153846154) to get x
100/19.846153846154=x
5.0387596899225=x
x=5.0387596899225

now we have:
19.5 is 5.0387596899225% of 387