2.78 is what percent of 66 - 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 66 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 66, so we can write it down as 100%=66.
4. We know, that x% equals 2.78 of the output value, so we can write it down as x%=2.78.
5. Now we have two simple equations:
1) 100%=66
2) x%=2.78
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%=66/2.78
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 2.78 is what percent of 66

100%/x%=66/2.78
(100/x)*x=(66/2.78)*x       - we multiply both sides of the equation by x
100=23.741007194245*x       - we divide both sides of the equation by (23.741007194245) to get x
100/23.741007194245=x
4.2121212121212=x
x=4.2121212121212

now we have:
2.78 is 4.2121212121212% of 66