What Are They?
Like fractions, decimals represent parts of a whole. In fact, all finite decimals (decimals that have an ending or repeat themselves) can be written as fractions. You probably already convert many fractions to decimals in your head without even realizing it, like converting to or to .
You have been using decimals for years. Every time you spend money you deal with decimals. Whenever you weigh produce at the grocery store, you will most likely get a decimal. Times at a swim meet? Decimals, decimals, decimals!