55 divided by 61 expressed as a percentage is 90.16%. This rounded figure tells you how large the fraction is compared to a whole.
The fraction 55/61 is already close to one whole unit, which is why its percentage is high. In everyday terms, if you had 61 pieces of something and you owned 55 of them, you would own about ninety percent of the total.
Seeing fractions as percentages makes it easier to compare sizes quickly. So whenever you see 55/61, you can think of it as roughly nine‑tenths of the whole, or 90.16% of it.