A) 6 6/11 * 3/4: 2 2/5*2 1/5= в) 9 1/3 : 7/8 * 9/16: 14/27=

a) 6 6/11 * 3/4: 2 2/5*2 1/5=72/11 * 3/4 : 12/5 * 11/5 = (72*3*5*11)/(11*4*12*5) = 4,5
в) 9 1/3 : 7/8 * 9/16:14/27= (28*8*16*27)/(3*7*16*14)=20 4/7