15.6 is what percent of 21.138 - 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 21.138 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 21.138, so we can write it down as 100%=21.138.
4. We know, that x% equals 15.6 of the output value, so we can write it down as x%=15.6.
5. Now we have two simple equations:
1) 100%=21.138
2) x%=15.6
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%=21.138/15.6
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 15.6 is what percent of 21.138

100%/x%=21.138/15.6
(100/x)*x=(21.138/15.6)*x       - we multiply both sides of the equation by x
100=1.355*x       - we divide both sides of the equation by (1.355) to get x
100/1.355=x
73.80073800738=x
x=73.80073800738

now we have:
15.6 is 73.80073800738% of 21.138