Сократите дробь на наибольший общий делитель ее числителя и знаменателя: 1) 42/24,35/77,48/60,72/96; 2) 10/100,400/1000,600/800,800/1000; 3) 72/90,60/105,45/105,84/120; 4) 56/70,36/90,66/110,96/100.

1) 42/24 = (6 * 7) / (3 * 6) = 7/3 = 2 1/3,

35/77 = (5 * 7) / (7 * 11) = 5/11,

48/60 = (4 * 12) / (5 * 12) = 4/5,

72/96 = (3 * 24) / (4 * 24) = 3/4;

2) 10/100 = 10 / (10 * 10) = 1/10,

400/1000 = (2 * 200) / (5 * 200) = 2/5,

600/800 = (3 * 200) / (4 * 200) = 3/4,

800/1000 = (4 * 200) / (5 * 200) = 4/5;

3) 72/90 = (3 * 18) / (5 * 18) = 3/5,

60/105 = (4 * 15) / (7 * 15) = 4/7,

45/105 = (3 * 15) / (7 * 15) = 3/7,

84/120 = (7 * 12) / (10 * 12) = 7/10;

4) 56/70 = (4 * 14) / (5 * 14) = 4/5,

36/90 = (2 * 18) / (5 * 18) = 2/5,

66/110 = (3 * 22) / (5 * 22) = 3/5,

96/100 = (4 * 24) / (5 * 25) = 24/25.