What is 30 percent of 815.1 - 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 815.1 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 815.1 is 100%, so we can write it down as 815.1=100%.
4. We know, that x is 30% of the output value, so we can write it down as x=30%.
5. Now we have two simple equations:
1) 815.1=100%
2) x=30%
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:
815.1/x=100%/30%
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 30% of 815.1

815.1/x=100/30
(815.1/x)*x=(100/30)*x       - we multiply both sides of the equation by x
815.1=3.3333333333333*x       - we divide both sides of the equation by (3.3333333333333) to get x
815.1/3.3333333333333=x
244.53=x
x=244.53

now we have:
30% of 815.1=244.53