The fraction 77/100 is equal to 77.00% when expressed as a percentage. This means that if you had a pie chart divided into 100 slices, 77 of those slices would be filled in. It's a way to represent parts of a whole, where the whole is considered to be 100%.
In everyday life, you might see 77% used in various contexts. For example, a weather forecast might say there's a 77% chance of rain tomorrow. Or a store could offer a 77% discount on certain items during a sale. It's a useful way to express proportions or probabilities that are more than half but not quite three-quarters of the total.