4 is what percent of 21.585 - 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 21.585 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 21.585, so we can write it down as 100%=21.585.
4. We know, that x% equals 4 of the output value, so we can write it down as x%=4.
5. Now we have two simple equations:
1) 100%=21.585
2) x%=4
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%=21.585/4
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 4 is what percent of 21.585

100%/x%=21.585/4
(100/x)*x=(21.585/4)*x       - we multiply both sides of the equation by x
100=5.39625*x       - we divide both sides of the equation by (5.39625) to get x
100/5.39625=x
18.531387537642=x
x=18.531387537642

now we have:
4 is 18.531387537642% of 21.585