Ответ:2/15
1-13/ 15=1/1 - 13/ 15= 1/1*15-13/15=. 15/15-13/15= 2/15
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Ответ:2/15
1-13/ 15=1/1 - 13/ 15= 1/1*15-13/15=. 15/15-13/15= 2/15