16/81 as a percentage is 19.75%.
The fraction 16/81 is a proper fraction, meaning the numerator is smaller than the denominator. When you write it as a decimal, it repeats as 0.1975 1975…, which is why the percentage rounds to 19.75%.
This kind of fraction shows up in everyday situations, like calculating a small part of a whole, for example a share of a pizza or a slice of a budget. Because it’s less than one‑fifth, it’s easy to see that it’s just under 20% of the total.
Remembering the rounded percentage helps when you need a quick estimate without digging into long division. If you need more precision, you can keep the repeating decimal in mind, but 19.75% is usually accurate enough for most practical purposes.