(5-3,75):1 7/8:(1 5/6-1 3/4)*2,4
1) 5 - 3,75 = 1,25 2) 1,25 : 1 7/8 = 1 1/4 : 1 7/8 = 5/4 :15/8 = 2/3 3) 1 5/6 - 1 3/4 = 5/6 - 3/4 = 10/12 - 9/12 = 1/12 4) 2/3 : 1/12 = 8 5) 8 * 2,4 = 19,2