What is 30/80 as a percentage? It is 37.50% when rounded to two decimal places. This percentage tells you how much of a whole the fraction represents.
The fraction 30/80 can be reduced to its simplest form, 3/8. Both numbers are small and easy to work with, which makes it simple to compare the part (30) to the whole (80). Seeing it as a fraction helps you understand the relationship before you think about percentages.
In everyday situations, you might use the 37.50% figure to describe a share of something—like getting 37.50% of a pizza when you eat 30 out of 80 slices in a large party. Percentages make it quick to compare parts of different sized groups, and this one is a clear, rounded number that’s easy to communicate.