91.00% is what you get when you turn the fraction 91/100 into a percentage.
The fraction 91/100 is already very close to a whole number, so its percent value looks almost the same as the original numerator. Seeing it as a percent can make it easier to compare with other percentages you might encounter in everyday life.
In practical terms, 91/100 (or 91.00%) can represent things like a test score, a discount, or the portion of a budget that’s been used. Knowing both forms—fraction and percentage—helps you communicate numbers clearly in school, work, or casual conversation.