Shan's suitcase weighs 8.34 kg. Steph's suitcase is 325 g lighter than Shan's. How heavy is Steph's suitcase? Give your answer in kilograms.

Steph's suitcase weighs 8.34 kg - 0.325 kg = <<8.34-0.325=8.015>>8.015 kg. Answer: \boxed{8.015}.