17.9 is what percent of 800 - 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 800 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 800, so we can write it down as 100%=800.
4. We know, that x% equals 17.9 of the output value, so we can write it down as x%=17.9.
5. Now we have two simple equations:
1) 100%=800
2) x%=17.9
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%=800/17.9
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 17.9 is what percent of 800

100%/x%=800/17.9
(100/x)*x=(800/17.9)*x       - we multiply both sides of the equation by x
100=44.692737430168*x       - we divide both sides of the equation by (44.692737430168) to get x
100/44.692737430168=x
2.2375=x
x=2.2375

now we have:
17.9 is 2.2375% of 800