A decimal number is like a mixed fraction: it has an integer part and a fractional part. If the fractional part is a repeating fraction then the whole number is represented by a repeating decimal.
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Any rational number, whose denominator has a prime factor other than 2 or 5 will have a decimal representation which is repeating. The size of the number, in relation to 1, is irrelevant.
0.000...1 Imagine the zeroes repeating into infinity with the 1 at the imaginary end of the infinite zeroes.
Any decimal that is greater than 0.01
The decimal value will be greater than 1, and the percent will be greater than 100%.
No. 2 is a prime but 1/2 is not a repeating decimal.