19.75 is what percent of 642.95 - 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 642.95 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 642.95, so we can write it down as 100%=642.95.
4. We know, that x% equals 19.75 of the output value, so we can write it down as x%=19.75.
5. Now we have two simple equations:
1) 100%=642.95
2) x%=19.75
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%=642.95/19.75
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 19.75 is what percent of 642.95

100%/x%=642.95/19.75
(100/x)*x=(642.95/19.75)*x       - we multiply both sides of the equation by x
100=32.554430379747*x       - we divide both sides of the equation by (32.554430379747) to get x
100/32.554430379747=x
3.0717785208803=x
x=3.0717785208803

now we have:
19.75 is 3.0717785208803% of 642.95