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17 31 и 68 155

3 целых 1 11 и 8 11

17/31:68/155=17/31*155/68=1/31×155/4=155/124=1,25=1 1/43 1/11 : 8/113 1/11=(1+3×11)/11=34/1134/11:8/11=34/11×11/8=34/8=4,25=4 1/4