SOLUTION: How do I add -4/5 + (-3/4)?

Question 271345: How do I add -4/5 + (-3/4)?
Found 2 solutions by LarissaRichardson, solver91311:
Answer by LarissaRichardson(34) (Show Source): You can put this solution on YOUR website!
Find the LCD which in this case is 20
-4/5 + -3/4
-16/20 + (-15/20)
-31/20
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

5 and 4 have no factors in common so the LCD is just the product, namely 20. Therefore:

All of which makes good sense because:

and

and

and

John

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