Question
Riordan joined Zumba Fitness Club three years ago when he weighed 80 kg 900 g. Given that he lost an average of 1 kg 400 g every year, how much does he weigh now? (Give the answer in kg and g.)
2 m

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Riordan joined Zumba Fitness Club three years ago when he weighed 80 kg 900 g. Given that he lost an average of 1 kg 400 g every year, how much does he weigh now? (Give the answer in kg and g.)