3.215 is what percent of 4 - 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 4 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 4, so we can write it down as 100%=4.
4. We know, that x% equals 3.215 of the output value, so we can write it down as x%=3.215.
5. Now we have two simple equations:
1) 100%=4
2) x%=3.215
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%=4/3.215
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 3.215 is what percent of 4

100%/x%=4/3.215
(100/x)*x=(4/3.215)*x       - we multiply both sides of the equation by x
100=1.244167962675*x       - we divide both sides of the equation by (1.244167962675) to get x
100/1.244167962675=x
80.375=x
x=80.375

now we have:
3.215 is 80.375% of 4