At junior swimming competitions on 100 meters Kostya needed to float the fourth part of a distance, and Vitya its fifth part. Which of them is closer to the finish and on how many meters?

100:4=25m-remained to Kostya, Vitya had 25-20=5m a difference. Vitya is closer. 100:4=25 (Kostya) 100:5=20 (Vitya) 25-20=5m. Answer: Kostya needed to float more on 5 m.
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