14/66 as a percentage is 21.21%. This number tells you how much of a whole 14 parts out of 66 represent, expressed in a way that's easy to compare with other percentages.
The fraction 14/66 can be reduced to 7/33, which still gives the same percentage value. Seeing it as a percentage makes it clear that the fraction is a little over one‑fifth of a whole.
In everyday situations, you might use this percentage to describe a portion of a group, a share of a budget, or any situation where you need a quick sense of scale. Remember, 21.21% means roughly one out of every five parts.