25/36 - 2/9 = (252 - 362) / 36*9 = (50 - 72) / 324 = -22 / 324 = -11 / 162
1/6 + 5/18 = (13 + 51) / 6*3 = (3 + 5) / 18 = 8 / 18 = 4 / 9
7/15 + 1/3 = (71 + 151) / 15*3 = (7 + 15) / 45 = 22 / 45
43/62 - 10/31 = (4331 - 6210) / 62*31 = (1333 - 620) / 1922 = 713 / 1922 = 101 / 274
25/36 - 2/9 = (252 - 362) / 36*9 = (50 - 72) / 324 = -22 / 324 = -11 / 162
1/6 + 5/18 = (13 + 51) / 6*3 = (3 + 5) / 18 = 8 / 18 = 4 / 9
7/15 + 1/3 = (71 + 151) / 15*3 = (7 + 15) / 45 = 22 / 45
43/62 - 10/31 = (4331 - 6210) / 62*31 = (1333 - 620) / 1922 = 713 / 1922 = 101 / 274