A usable fraction is a fraction you can use to measure with (i.e., 1/2, 1/4, 1/8, 1/16 inch). You measure with fractions of an inch. However, your calculator works in decimals of an inch.

To decide if two fractions are equivalent: Simplify each fraction to its lowest terms and then compare the two fractions. If the simplest form of each is the same, then the two fractions are ...