1) 25/75 = 1/3; 42/320 = 21/160; 33/243 = 11/812) 125/710 = 60/70 = 6/7; 2143/9105 = 252/945 = 4/15; 19811/1257*7 = 1608/4788 = 564/1596 = 94/266
1) 25/75 = 1/3; 42/320 = 21/160; 33/243 = 11/81
2) 125/710 = 60/70 = 6/7; 2143/9105 = 252/945 = 4/15; 19811/1257*7 = 1608/4788 = 564/1596 = 94/266