Кузнецов Игнатий 1) 2а/21 : 4b/49=2а/21 * 49/4b=1а/3 * 7/2b=7а/6b; 2) 11m/9n : 22n/27m=11m/9n * 27m/22n=1m/1n * 3m/2n=3m^2/2n^2; 3) 36ab/17c : 21b/34c=36ab/17c * 34c/21b=12a/1 * 2/7=24a/7; 4) 51x/32y : 17x/16y=51x/32y * 16у/17x=3x/2y * 1у/1x=3/2=1 1/2.
