а)78/338 = 26*3/26*13 = 3/13
б)700/840 = 140*5/140*6 = 5/6
в)255/525 = 15*17/15*35 = 17/35
г)324/405 = 81*4/81*5 = 4/5
д)84*108 2*7*6*2*3*9*2
______ = 6*2*2*2*7*9*2 = 3/2 = 1 целая 1/2
48*126
е)96*35*110 8*3*4*35*11*10
_________ = 3*11*8*10*3*35 = 4/3 = 1 целая 1/3
33*80*105