The best description of the number 0.5 is a rational number and a terminating decimal.
What is a rational number?
This is a number that is possible to express by using a fraction, or ration. 0.5 is a rational number because it is equivalent to the faction 1/2.
What is a terminating decimal?
A decimal is terminating if it has limited or finite figures after the decimal period. This occurs with 0.5 because there is only one number after the period.
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