(7/24 : 0,125 + 3,5) / (2/3 - 0,25) = 14,
1) 7/24 : 0,125 = 7/24 : 125/1000 = 7/24 * 1000/125 = 7/24 * 8 = 7/3 = 2 1/3,
2) 2 1/3 + 3,5 = 7/3 + 35/10 = 70/30 + 105/30 = 175/30 = 5 5/6,
3) 2/3 - 0,25 = 2/3 - 25/100 = 2/3 - 1/4 = 8/12 - 3/12 = 5/12,
4) 5 5/6 : 5/12 = 35/6 * 12/5 = 7 * 2 = 14