The answer depends on which string is repeating. That is, is the number meant to be0.878787... or 0.877777... ?
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87/100
0.78 repeating as a fraction = 78/99
What is 1.49 repeating (9 is repeating)
0.54 repeating as a fraction = 54/99 or 6/11
As a fraction it is 193/990 = .1'94' repeating '94'