3/15 = 20%
A value like 3/15, or 20%, can show up when three out of fifteen people choose the same option in a survey. It could also describe a sale discount, the amount of a project completed, or the share of students who walk to school.
To picture 3/15 quickly, imagine a group of fifteen equal items with three highlighted. Since it is one-fifth of the whole, you can estimate it as a small section that is about the same size as 2 out of every 10 items.
A common mistake is thinking that 3/15 is larger because both numbers are bigger than those in a simpler fraction. The numerator and denominator must be considered together, so the fraction represents only a modest portion of the total.