4/91 as a percentage is 4.40%. This tiny fraction shows up in many everyday situations, from school projects to simple statistics. The rounded value makes it easy to compare with other percentages you might see.
The fraction 4/91 is already in its simplest form, meaning the numerator and denominator share no common factors other than 1. Because the denominator is relatively large compared to the numerator, the overall value is quite small—just a few percent of a whole.
In real life, you might encounter something like 4 out of 91 students choosing a particular option in a survey. Saying that 4.40% of the class selected that option is clearer and more intuitive than leaving the answer as a fraction.
Remember, when you need to communicate small parts of a whole, converting a fraction to a percentage—like 4.40%—helps your audience understand the size of the portion quickly.