Explicación paso a paso:
3/10 - 2/5 = 15 - 20 o 20 - 15 sobre 50 = 5/50
20-15=5
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Explicación paso a paso:
3/10 - 2/5 = 15 - 20 o 20 - 15 sobre 50 = 5/50
20-15=5