1) 23/25 - 11/15 = (233 - 115) / (25*3) = (69 - 55) / 75 = 14 / 75
2) 15/16 8/9 = (158) / (16*9) = 120 / 144 = 5 / 6
3) 3 1/2 1 3/8 = (32 + 1) / 2 (18 + 3) / 8 = 7 / 2 11 / 8 = (711) / 2*8 = 77 / 16
4) 45/46 : 15/23 = 45/46 23/15 = (4523) / (46*15) = 1035 / 690 = 69 / 46.
1) 23/25 - 11/15 = (233 - 115) / (25*3) = (69 - 55) / 75 = 14 / 75
2) 15/16 8/9 = (158) / (16*9) = 120 / 144 = 5 / 6
3) 3 1/2 1 3/8 = (32 + 1) / 2 (18 + 3) / 8 = 7 / 2 11 / 8 = (711) / 2*8 = 77 / 16
4) 45/46 : 15/23 = 45/46 23/15 = (4523) / (46*15) = 1035 / 690 = 69 / 46.