The fraction 2/78 expressed as a percentage is 2.56%. This value tells you that the part is just a little over two percent of the whole.
A fraction like 2/78 is a tiny piece of a larger set. If you imagined 78 equal items, only two of them would be counted in this portion.
Because the number is rounded to two decimal places, the percentage looks neat and easy to read. The rounding helps keep the figure simple without losing much accuracy.
You might see this kind of percentage when looking at small probabilities, interest rates, or test scores that involve only a few points out of a larger total. It gives a quick sense of how small the share really is.