2.1 is what percent of 17.2 - 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 17.2 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 17.2, so we can write it down as 100%=17.2.
4. We know, that x% equals 2.1 of the output value, so we can write it down as x%=2.1.
5. Now we have two simple equations:
1) 100%=17.2
2) x%=2.1
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%=17.2/2.1
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 2.1 is what percent of 17.2

100%/x%=17.2/2.1
(100/x)*x=(17.2/2.1)*x       - we multiply both sides of the equation by x
100=8.1904761904762*x       - we divide both sides of the equation by (8.1904761904762) to get x
100/8.1904761904762=x
12.209302325581=x
x=12.209302325581

now we have:
2.1 is 12.209302325581% of 17.2