Приведем дробь к общему знаменателю:
1) 2/9 и 5/12;
2 * 4/(9 * 4) и 5 * 3/(12 * 3);
8/36 b 15/36.
2) 2/7 и 3/14;
4/14 и 3/14.
3) 5/9 и 2/27;
15/27 и 2/27;
4) 3/8 и 2/9;
27/72 и 16/72;
5) 3/19 и 2/3;
9/57 и 18/57;
6) 2/15 и 5/18;
12/90 и 25/90;
7) 2/9 и 3/4;
8/36 и 27/36;
8) 5/12 и 5/16;
80/192 и 75/192;
9) 7/12 и 4/15;
35/60 и 16/60.
Приведем дробь к общему знаменателю:
1) 2/9 и 5/12;
2 * 4/(9 * 4) и 5 * 3/(12 * 3);
8/36 b 15/36.
2) 2/7 и 3/14;
4/14 и 3/14.
3) 5/9 и 2/27;
15/27 и 2/27;
4) 3/8 и 2/9;
27/72 и 16/72;
5) 3/19 и 2/3;
9/57 и 18/57;
6) 2/15 и 5/18;
12/90 и 25/90;
7) 2/9 и 3/4;
8/36 и 27/36;
8) 5/12 и 5/16;
80/192 и 75/192;
9) 7/12 и 4/15;
35/60 и 16/60.