31/100 as a percentage is 31.00%. This number shows how much of a whole the fraction represents when we look at it in terms of hundredths.
The fraction 31/100 is already in a simple form, where the numerator (31) tells us how many parts we have and the denominator (100) tells us the total number of equal parts that make up a whole. Because the denominator is 100, it lines up perfectly with the idea of “percent,” which also means “per hundred.”
Seeing the fraction as 31.00% makes it easy to compare with other percentages, like sales tax or test scores. It tells you that the part is just a little under a third of the whole, which is useful in everyday calculations.