18/91 as a percentage is 19.78%. This rounded figure gives a quick sense of how the fraction relates to a whole.
The fraction 18/91 is already in its simplest form, meaning the numbers share no common divisor other than 1. As a decimal it sits just under 0.2, which matches the percentage we just saw.
In everyday contexts, 19.78% can be useful for estimating parts of a group, such as when 18 out of 91 students receive a scholarship. It tells you that roughly one‑fifth of the total is involved, making it easy to grasp without heavy calculations.
