84.75% is what you get when you turn the fraction 50/59 into a percentage. This number shows how close 50 is to the whole 59 parts, expressed out of 100.
The fraction 50/59 is a proper fraction, meaning the numerator is smaller than the denominator. It can be thought of as taking 50 pieces out of a total of 59 equal pieces.
When you write it as a percentage, the value is easy to compare with other percentages, like grades or interest rates. It tells you that 50 out of 59 is a little less than 85 out of 100.
Knowing both forms—fraction and percentage—helps you switch between exact values (the fraction) and everyday language (the percentage) whenever you need to communicate numbers clearly.