Which set of numbers best describes the display weights on a digital scale that shows each weight to the nearest half pound?

The set of rational numbers is the set of real numbers which can be expressed in the form a/b where a and b are integers.

Rational numbers can also be identified as terminating or recurring decimal numbers.

The display weights on a digital scale that shows each weight to the nearest half pound gives a terminating decimal number.

Hence, it is best described by the set of real numbers.