Since your question is as ambiguous as it is trivial I will answer all possible interpretations:
6*8+4/5 = 48+4/5
6*(8+4/5) = 52+4/5
6*(8+4)/5 = 14+2/5
(6*8+4)/5 = 10+2/5
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4/5+ 2/5 = 6/5 = 1/1/5 or 1.2
6 multiplied by 4/5 is 4 4/5
12p/5 = 10 12p = 50 p = 50/12 or 25/6 or 4 and 1/6
4/5 of 7.5 = 6
We can convert into seventy-fifths. 6 and nine seventy-fifths minus twenty-five seventy-fifths equals negative 6 and thirty-four seventy-fifths.