((5/18-4/15)/16+3 14/15)/0.8

((5/18-4/15)/16+3 14/15)/0.8 = 5/7176 1) 5/18-4/15=25/90-24/90=1/90 2) 16+3 14/15=19 14/15 3) 1/90:19 14/15 = 1/90:299/15 = 1/90*15/299 = 1/1794 4) 1/1794:0,8 = 1/1794:8/10 = 1/1794:4/5 = 1/1794*5/4 = 5/7176