Final answer:
The decimal 0.186 is a rational and nonterminating number.
Step-by-step explanation:
The decimal 0.186 can be classified as rational and nonterminating.
A rational number is a number that can be expressed as a fraction. Since 0.186 can be written as 186/1000, it is a rational number.
A nonterminating decimal is a decimal that goes on forever without repeating. Since the decimal 0.186 does not repeat, it is also nonterminating.