4,25 - 3,6/1 7/20 + 8 1/4 * 1 52/99 - 12 2/3 = 1 7/12
1) 3,6 / 1 7/20 = 36/10 / 27/20 = 8/3
2) 8 1/4 * 1 52/99 = 33/4 * 152/99 = 38/3
4,25 = 4 1/4 = 17/4
3) 17/4 - 8/3 = 51/12 - 32/12 = 19/12
4) 19/12 + 38/3 = 19/12 + 152/12 = 171/12
5) 171/12 - 12 2/3 = 171/12 - 38/3 = 171/12 - 152/12 = 19/12 = 1 7/12