Question
Bobby has a mass of 78 kg. Oscar is 13 kg lighter than Bobby.
  1. What is Oscar's mass?
  2. Express Oscar's mass as a fraction of Bobby's mass. Give your answer in its lowest terms.
4 m
(a)

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(b)

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Bobby has a mass of 78 kg. Oscar is 13 kg lighter than Bobby.
  1. What is Oscar's mass?
  2. Express Oscar's mass as a fraction of Bobby's mass. Give your answer in its lowest terms.