Answers

2014-07-26T19:38:31+08:00
21/28 = 3/4
36/72 = 1/2
77/147 = 11/21
35/75 = 7/15
0
2014-07-27T15:09:13+08:00
21/28 = 3/4
36/72 = 1/2
77/147 = 11/21
35/75 = 7/15

0