1) 23/25 - 11/15 = (2315 - 1125) / (25*15) = (345 - 275) / 375 = 70 / 375 = 14 / 75
2) 15/16 8/9 = (158) / (16*9) = 120 / 144 = 5 / 6
3) 3 1/2 1 3/8 = (3 + 1/2) (1 + 3/8) = (6/2 + 1/2) (8/8 + 3/8) = (7/2) (11/8) = 77 / 16
4) 45/46 : 15/23 = (4523) / (4615) = 1035 / 690 = 69 / 46
1) 23/25 - 11/15 = (2315 - 1125) / (25*15) = (345 - 275) / 375 = 70 / 375 = 14 / 75
2) 15/16 8/9 = (158) / (16*9) = 120 / 144 = 5 / 6
3) 3 1/2 1 3/8 = (3 + 1/2) (1 + 3/8) = (6/2 + 1/2) (8/8 + 3/8) = (7/2) (11/8) = 77 / 16
4) 45/46 : 15/23 = (4523) / (4615) = 1035 / 690 = 69 / 46