3 5 1 2 4
1 1/48 * 2 2/5 - (9 1/6 * 4/15 + 2 5/9) * 2/5 = 9/20 = 0,45
1) 9 1/6 * 4/15 = 55/6 * 4/15 = 11/3 * 2/3 = 22/9 = 2 4/9
2) 2 4/9 + 2 5/9 = 4 9/9 = 5
3) 1 1/48 * 2 2/5 = 49/48 * 12/5 = 49/4 * 1/5 = 49/20 = 2 9/20 = 2,45
4) 5 * 2/5 = 2
5) 2,45 - 2 = 0,45 = 9/20