42 is what percent of 1397 - 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 1397 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 1397, so we can write it down as 100%=1397.
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%=1397
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%=1397/42
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 1397

100%/x%=1397/42
(100/x)*x=(1397/42)*x       - we multiply both sides of the equation by x
100=33.261904761905*x       - we divide both sides of the equation by (33.261904761905) to get x
100/33.261904761905=x
3.0064423765211=x
x=3.0064423765211

now we have:
42 is 3.0064423765211% of 1397