66.2 is what percent of 1290.21 - 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 1290.21 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 1290.21, so we can write it down as 100%=1290.21.
4. We know, that x% equals 66.2 of the output value, so we can write it down as x%=66.2.
5. Now we have two simple equations:
1) 100%=1290.21
2) x%=66.2
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%=1290.21/66.2
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 66.2 is what percent of 1290.21

100%/x%=1290.21/66.2
(100/x)*x=(1290.21/66.2)*x       - we multiply both sides of the equation by x
100=19.489577039275*x       - we divide both sides of the equation by (19.489577039275) to get x
100/19.489577039275=x
5.1309476751847=x
x=5.1309476751847

now we have:
66.2 is 5.1309476751847% of 1290.21