288/1440 = 20%
A value like 288/1440, or 20%, can show up in everyday situations such as a store discount, a test score, or the amount of a project that is finished. For example, a 20% discount means you pay four-fifths of the original price.
You can picture 20% as one-fifth of a whole, since five equal parts would make 100%. It is also easy to estimate as two parts out of ten, or about one part in every five.
A common mistake is thinking that 20% means 20 percentage points added to any number, rather than 20 parts out of 100 of that amount. Another point of confusion is that a 20% discount and a 20% increase do not cancel each other out.
