Final answer:
A repeating decimal is a decimal number in which one or more digits repeat infinitely. The decimal 0.777777 is an example of a repeating decimal.
Step-by-step explanation:
A repeating decimal is a decimal number in which one or more digits repeat infinitely. In the given options, the decimal 0.777777 is an example of a repeating decimal because the digit 7 repeats infinitely. The other options do not have repeating digits, so they are not examples of repeating decimals.
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