1) (1/2 - 1/4) : 1/8 = (2/8 - 1/4) : 1/8 = (1/8) : 1/8 = 1
2) (7 - 1 5/9 : 7/24) 1 7/20 = (7 - 54/9 : 7/24) 1 7/20 = (7 - 6 : 7/24) 1 7/20 = (7 - 144/7) 1 7/20 = (7 - 20 4/7) 1 7/20 = (7 - 144/7) 27/20 = (49/7 - 144/7) 27/20 = (49 - 144) / 7 27/20 = (-95) / 7 * 27/20 = -135 / 4 = -33 3/4
1) (1/2 - 1/4) : 1/8 = (2/8 - 1/4) : 1/8 = (1/8) : 1/8 = 1
2) (7 - 1 5/9 : 7/24) 1 7/20 = (7 - 54/9 : 7/24) 1 7/20 = (7 - 6 : 7/24) 1 7/20 = (7 - 144/7) 1 7/20 = (7 - 20 4/7) 1 7/20 = (7 - 144/7) 27/20 = (49/7 - 144/7) 27/20 = (49 - 144) / 7 27/20 = (-95) / 7 * 27/20 = -135 / 4 = -33 3/4