Question
Ben has a mass of 39 kg. Bobby is 13 kg lighter than Ben.
  1. What is Bobby's mass?
  2. Express Bobby's mass as a fraction of Ben's mass. Give your answer in its lowest terms.
4 m
(a)

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(b)

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Ben has a mass of 39 kg. Bobby is 13 kg lighter than Ben.
  1. What is Bobby's mass?
  2. Express Bobby's mass as a fraction of Ben's mass. Give your answer in its lowest terms.