Answer :

sqdancefan

Answer:

  91/120

Step-by-step explanation:

It might be convenient to use the form ...

  (a/b) +(c/d) = (ad +bc)/(bd)

__

  -2/3 +4/5 +5/8 = (-2/3 +4/5) +5/8

  = (-10 +12)/15 +5/8

  = 2/15 +5/8

  = (16 +75)/120

  = 91/120

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