(0.8*4 1/11+2 1/4 : 1 4/5)/ 1.125+3/8 = 398/1023
1) 0/8 * 4 1/11 = 8/10* 45/11 = 8*9/2*11 = 72/22 = 3 6/22 = 3 3/11
2) 2 1/4: 1 4/5 = 9/4 : 9/5 = 5/4 = 1 1/4
3) 3 3/11 + 1 1/4 = 3 12/44 + 1 11/44 = 4 23/44.
4) 1.125+3/8 = 1125/100 + 3/8 = 9000/800 + 300/800 = 9300/800 = 93/8=11 5/8
5) 4 23/44 : 11 5/8 = 199/44 : 8/93 = 398/1023.