77 is what percent of 780 - 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 780 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 780, so we can write it down as 100%=780.
4. We know, that x% equals 77 of the output value, so we can write it down as x%=77.
5. Now we have two simple equations:
1) 100%=780
2) x%=77
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%=780/77
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 77 is what percent of 780

100%/x%=780/77
(100/x)*x=(780/77)*x       - we multiply both sides of the equation by x
100=10.12987012987*x       - we divide both sides of the equation by (10.12987012987) to get x
100/10.12987012987=x
9.8717948717949=x
x=9.8717948717949

now we have:
77 is 9.8717948717949% of 780