6 3/4; 5 9/20; 8 6/25; 1 3/50 -к знаменателю100

6 3/4 = 27/4 = (27*25) / (4*25)  = 675/100 5 9/20 = 9 45/100 = 945/1008 6/25 = 8 24/100 = 824/1001 3/50 = 1 6/100 = 106/100