28/74 as a percentage is 37.84%. This is the rounded value you get when you change the fraction into a percent format.
The fraction 28/74 can be reduced to 14/37, which still represents the same part of a whole. In decimal form it is about 0.378, so it is just under four tenths of anything you compare it to.
Knowing that 37.84% is the percent version helps when you need to compare parts of a whole in everyday situations—like grades, discounts, or statistics. The rounding to two decimal places makes the number easy to read and use without losing much accuracy.