21/28 = 75%
A fraction like 21/28 can show up when 21 out of 28 people choose the same option in a survey. That means 75% of the group chose it, which could also describe attendance, completed assignments, or working items in a batch.
To picture 21/28 quickly, imagine a whole divided into four equal parts and shade three of them. Since 75% is three-fourths, the amount is fairly high but still leaves one-fourth, or 25%, unshaded.
A common mistake is to think 21/28 means 21 out of 100 because the numerator is 21. The denominator tells you the total number of parts, so this fraction describes 21 out of 28, not 21%.
