Answer:Peter used 0.3 kg of meat per portion of spaghetti.Step-by-step explanation:Find the meat used for spaghetti: Peter used 5 kg - 1.10 kg = 3.9 kg of meat for spaghetti.Calculate meat per portion: He used 3.9 kg / 13 portions = 0.3 kg of meat per portion of spaghetti.