42 is what percent of 3580 - 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 3580 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 3580, so we can write it down as 100%=3580.
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%=3580
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%=3580/42
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 3580

100%/x%=3580/42
(100/x)*x=(3580/42)*x       - we multiply both sides of the equation by x
100=85.238095238095*x       - we divide both sides of the equation by (85.238095238095) to get x
100/85.238095238095=x
1.1731843575419=x
x=1.1731843575419

now we have:
42 is 1.1731843575419% of 3580