21.58 is what percent of 154.4 - 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 154.4 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 154.4, so we can write it down as 100%=154.4.
4. We know, that x% equals 21.58 of the output value, so we can write it down as x%=21.58.
5. Now we have two simple equations:
1) 100%=154.4
2) x%=21.58
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%=154.4/21.58
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.58 is what percent of 154.4

100%/x%=154.4/21.58
(100/x)*x=(154.4/21.58)*x       - we multiply both sides of the equation by x
100=7.1547729379055*x       - we divide both sides of the equation by (7.1547729379055) to get x
100/7.1547729379055=x
13.976683937824=x
x=13.976683937824

now we have:
21.58 is 13.976683937824% of 154.4