Привндите дроби к общему знаменателю 6_15 и 11_18, 4_15 и 3_20, 2_77и 3_44, 4_49и5__63, 5_16 и 5_12, 5_121 и 8_99, 1_51 и 1_68, 15_98 и 13_72
36/90 и 55/90, 16/60 и 9/60, 88/3388 и 231/3388, 252/3087 и 245/3087, 15/48 и 20/48, 495/11979 и 968/11979, 8/408 и 6/408, 1080/7056 и 1274/7056