it's called a vinculum it signifies a repeeting group
no if a decimal has a vinculum over it it is a repeeting decimal so
1/3=0.333333333333333333333 or
_
0.3 (3 has a vinculum over it)
or
0.345345345345345 is also
___
0.345 (345 has a vinculum over it)
it could be negative but
