Сравните числа: 1/8 и 3/7, 2/3 и 1/8, 3/9 и 1/8, 5/14 и 1/4, и 2/3 и 1/8, 13 и 30, и 7/15 и 3/10, 1/6 и 1/5, 21/11 и 11/21, 9/25 и 11/33.

1/8=7/56; 3/7=24/56;  1/8 < 3/7
2/3= 16/24;   1/8=3/24;    2/3 >1/8
3/9=1/3;  1/3 > 1/8
5/14=10/28;   1/4=7/28;   5/14>1/4
2/3=16/24;  1/8=3/24;   2/3>1/8
13<30
7/15=14/30;  3/10=9/30;  7/15>3/10
1/6<1/5
21/11>11/21
9/25=27/75;  11/33=1/3=25/75;  9/25>11/33