35/55 as a percentage is 63.64%. This number tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 35/55 can be simplified to 7/11, which is easier to work with in many situations. Even after simplifying, the percentage value stays the same because it still reflects the same part of the whole.
Seeing a percentage like 63.64% helps you quickly compare sizes. For example, if a test score is 63.64%, you know the result is a little above the halfway mark.
In everyday life, percentages make it simple to understand discounts, grades, or statistics without having to deal with complex fractions.