Raju's mass is 3/5 * 75 kg = <<3/5*75=45>>45 kg.
Andy's mass is 7/9 * 45 kg = <<7/9*45=35>>35 kg. Answer: \boxed{35}.
Salim has a mass of 75 kg. Raju's mass is 3 5 of Salim's mass. Andy's mass is 7 9 of Raju's mass. Find Andy's mass.
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