1)2 2/3:х=7,125:10 (2) 1,75:3,25=15:х
8/3:х=7125/1000:10 1,77:3,25=15:х 8/3:х=7125/10000 177/325=15:х х=8/3:7125/1000 х=15:177/325 х=8/3*10000/7125 х=15*325/177 х=80000/21375 х=27 32/59 х=3 127/171