12/29 as a percentage is 41.38%. This fraction is a little less than half, so the number looks familiar when you see it as a percent. It’s a tidy way to compare the part to the whole in everyday situations.
When you see 41.38%, you can quickly tell that about four out of every ten pieces are represented. That makes it easy to understand percentages in shopping discounts, test scores, or any data that uses parts of a whole.
The value is rounded to two decimal places, which keeps it simple without losing much accuracy. Using 41.38% lets you communicate the size of 12 out of 29 clearly and efficiently.