What is 9.78 percent of 42.72 - 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 42.72 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 42.72 is 100%, so we can write it down as 42.72=100%.
4. We know, that x is 9.78% of the output value, so we can write it down as x=9.78%.
5. Now we have two simple equations:
1) 42.72=100%
2) x=9.78%
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:
42.72/x=100%/9.78%
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 9.78% of 42.72

42.72/x=100/9.78
(42.72/x)*x=(100/9.78)*x       - we multiply both sides of the equation by x
42.72=10.224948875256*x       - we divide both sides of the equation by (10.224948875256) to get x
42.72/10.224948875256=x
4.178016=x
x=4.178016

now we have:
9.78% of 42.72=4.178016