Помогите решить: 5/9*7/8, 4/27*9/16, 1 7/33*17/15, 5 5/6*2 4/7, 1 5/12*2 4/7

5/9*7/8 = 5*7/9*8 = 35/72 ; 4/27*9/16 = 4*9/27*16 = 1*1/3*4 = = 1/12 ; 1 7/33*17/15 = 17*17/33*15 = 289/495 ;