I tried this:
3/5 + 4 - 2/5(8 - 6) / 3
(3/5 + 4) - 2/5(2) / 3
(23/5) - (4/5 / 3)
23/5 - (12/15 / 3)
23/5 - (4/15)
69/15 - 4/15
65/15 or
_
4.3 or 4 1/3
and got the answer 4 1/3. But I still not sure if my solving method is right! I know the answer but if anyone could elaborate I'd be much obliged. >_<
Call it 21 fifths minus 13 fifths, ie 8 fifths which is one-and-three-fifths
We convert it into thirty-fifths. That gives 15 thirty-fifths minus 14 thirty-fifths which is one thirty fifth.
Negative ten fifths.
two fifths
6 and two fifths
minus three fifths
Two and two fifths. Five minus two and three fifths = two and two fifths
Call it 21 fifths minus 13 fifths, ie 8 fifths which is one-and-three-fifths
two fifths
We convert it into thirty-fifths. That gives 15 thirty-fifths minus 14 thirty-fifths which is one thirty fifth.
Negative ten fifths.
Fourteen and four fifths.
two fifths
6 and two fifths
1 and 4 fifths.
six and three fifths
the answer is negative 11 fifths