If there is a line over a decimal, it means the decimal is repetitive.
If you are typing it would look like this...
.7
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Either, the decimal with a line over what's repeating (eg. 0.6 with a line over it), or decimal repeating (eg. "point six repeating").
A bar.
periodic line
.833 IS a repeating decimal. This is a rational number as well as it has a repetitive pattern.
If handwritten, draw a line over the repeated numbers.