9/45 = 20%
A value like 9/45, or 20%, can show up in everyday situations, such as when 9 of 45 students bring lunch from home. It might also describe a sale discount or the share of a group that prefers a certain choice.
To picture it quickly, think of 20% as about one-fifth of the whole. So 9/45 is a little less than a quarter, but more than one-tenth.
A common mix-up is treating 20% as 20 out of every 20, rather than 20 out of every 100. Also, 9/45 does not mean 9% just because the top number is 9.
