47/82 as a percentage is 57.32%. This number tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 47/82 means 47 parts out of a total of 82 equal parts. When you compare those parts to a full set of 100, you get the percentage shown above.
Seeing the percentage makes it easy to understand the size of the fraction quickly. For example, if you earned 47 points out of a possible 82 on a test, you would have scored about 57.32% of the total points.
Because the value is rounded to two decimal places, the actual number could be a tiny bit higher or lower, but 57.32% is a clear and useful estimate for everyday use.