21/100 = 21%
A value like 21/100, or 21%, can show up in everyday life as a discount, a test score, or the amount of a budget spent on one category. For example, a store might offer 21% off, or a survey might report that 21 out of every 100 people chose a certain answer.
To picture 21% quickly, imagine a group of 100 objects with about one-fifth marked, plus one extra object. It is a little more than 20%, so estimating it as roughly one-fifth can help you understand its size.
A common mistake is confusing 21% with 0.21% because both use the same digits. Remember that 21% means 21 parts out of 100, while 0.21% is much smaller—just 0.21 parts out of 100.
