42 is what percent of 872.7 - 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 872.7 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 872.7, so we can write it down as 100%=872.7.
4. We know, that x% equals 42 of the output value, so we can write it down as x%=42.
5. Now we have two simple equations:
1) 100%=872.7
2) x%=42
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%=872.7/42
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 42 is what percent of 872.7

100%/x%=872.7/42
(100/x)*x=(872.7/42)*x       - we multiply both sides of the equation by x
100=20.778571428571*x       - we divide both sides of the equation by (20.778571428571) to get x
100/20.778571428571=x
4.8126503953249=x
x=4.8126503953249

now we have:
42 is 4.8126503953249% of 872.7