28/56 = 50%
A fraction like 28/56 can show up when 28 out of 56 students choose the same lunch, vote for the same option, or attend an event. In each case, it represents 50% of the total, or half of the group.
To picture 28/56 quickly, imagine a whole pizza divided into two equal halves: this fraction represents one of those halves. You can also estimate it by noticing that 28 is half of 56, so the value is about one-half or 50%.
A common point of confusion is thinking that the numbers 28 and 56 must be compared separately instead of as parts of one whole. The denominator, 56, tells you the total amount, while 28 tells you how many parts are being counted.