27 is what percent of 391 - 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 391 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 391, so we can write it down as 100%=391.
4. We know, that x% equals 27 of the output value, so we can write it down as x%=27.
5. Now we have two simple equations:
1) 100%=391
2) x%=27
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%=391/27
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 27 is what percent of 391

100%/x%=391/27
(100/x)*x=(391/27)*x       - we multiply both sides of the equation by x
100=14.481481481481*x       - we divide both sides of the equation by (14.481481481481) to get x
100/14.481481481481=x
6.9053708439898=x
x=6.9053708439898

now we have:
27 is 6.9053708439898% of 391