Let's take x% of 82 is 65.60.
x% of 82 =
=

Now we can equate it with 65.60. The equation can be written as,

To find x, first we have to move 100 to the right side. 100 is divided there. To move it to other side we have to use reverse operation of division. Reverse operation of division is multiplication. So we will multiply 100 to both sides. We will get,



Now to get x, we will divide both sides by 82. We will get,



We have got the required answer.
The required percentage is 80%.