34/65 as a percentage is 52.31%. This number tells you that the fraction is just over half of a whole. When you see the percentage, you can quickly understand the size of the part without working with the fraction itself.
The fraction 34/65 is already in its simplest form, because the numerator and denominator share no common factors other than 1. It represents 34 equal parts out of a total of 65 equal parts. Seeing it as a percentage makes it easier to compare with other numbers that are also expressed in percent.
In everyday situations, you might use this conversion when dealing with grades, discounts, or statistics. For example, if a test score was 34 out of 65 points, you could say the student earned 52.31% of the possible points, which is a clear way to communicate the result.