35/66 as a percentage is 53.03%. This is the rounded value you get when you change the fraction into a percent.
The fraction 35/66 is a little more than one half, because 33/66 would be exactly 50%. The extra 2/66 pushes it a bit higher, landing at just over 53%.
When you look at 53.03%, it tells you that out of every 100 parts, about 53 are represented by the fraction. This makes it easy to compare with other percentages you might see in everyday data.
Understanding fractions as percentages helps you quickly see how large or small a part is relative to a whole, which is useful in school, shopping, or any situation that involves numbers.