What is 50 percent of 42.58 - 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 42.58 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 42.58 is 100%, so we can write it down as 42.58=100%.
4. We know, that x is 50% of the output value, so we can write it down as x=50%.
5. Now we have two simple equations:
1) 42.58=100%
2) x=50%
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:
42.58/x=100%/50%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 50% of 42.58

42.58/x=100/50
(42.58/x)*x=(100/50)*x       - we multiply both sides of the equation by x
42.58=2*x       - we divide both sides of the equation by (2) to get x
42.58/2=x
21.29=x
x=21.29

now we have:
50% of 42.58=21.29