17/50 - 2/15 = (17*3)/(50*3) - (2*10)/(15*10) = 51/150 - 20/150 = 31/150
Ответ: 31/150
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17/50 - 2/15 = (17*3)/(50*3) - (2*10)/(15*10) = 51/150 - 20/150 = 31/150
Ответ: 31/150