25/100 = 25%
A value like 25% shows up often in everyday life. For example, a store might offer 25% off a jacket, or a sports team might have won 25% of its games.
You can picture 25% as one out of every four equal parts. It is also close to one-quarter, so estimating it quickly means imagining a whole divided into four sections and focusing on one section.
A common mistake is confusing 25% with 25 percentage points or with 0.25%—they are not the same. Another point of confusion is that taking 25% off a price does not mean the final price is 25% of the original; it leaves 75% of the original price.