317.7 is what percent of 420 - 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 420 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 420, so we can write it down as 100%=420.
4. We know, that x% equals 317.7 of the output value, so we can write it down as x%=317.7.
5. Now we have two simple equations:
1) 100%=420
2) x%=317.7
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%=420/317.7
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 317.7 is what percent of 420

100%/x%=420/317.7
(100/x)*x=(420/317.7)*x       - we multiply both sides of the equation by x
100=1.3220018885741*x       - we divide both sides of the equation by (1.3220018885741) to get x
100/1.3220018885741=x
75.642857142857=x
x=75.642857142857

now we have:
317.7 is 75.642857142857% of 420