54/66 as a percentage is 81.82%. This number comes from reducing the fraction and then changing it into a percent, which gives a quick sense of how large the part is compared to a whole.
The fraction 54/66 can also be simplified to 9/11, which still represents the same size. Seeing it as a percent (81.82%) makes it easier to compare with other values that are already expressed in percent form.
In everyday situations, you might use this percentage to understand portions, like how much of a pizza is left if 54 out of 66 slices have been eaten. It’s a handy way to see the size of a part without dealing with fractions.
