Express the no 0.313131.... in the form of rational no a/b.
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X = 0.313131313131.......
100x = 31.313131313131......
100x -x = 31
99x = 31
X ,= 31/99
100x = 31.313131313131......
100x -x = 31
99x = 31
X ,= 31/99
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