(5,4 - 2 1/3) : 7 2/3 = 2/5 (или 0,4),
1) 5,4 - 2 1/3 = 54/10 - 7/3 = 162/30 - 70/30 = 92/30 = 3 2/30,
2) 3 2/30 : 7 2/3 = 92/30 : 23/3 = 92/30 * 3/23 = 92/230 = 4/10 = 2/5 (или 0,4)
(5,4 - 2 1/3) : 7 2/3 = 2/5 (или 0,4),
1) 5,4 - 2 1/3 = 54/10 - 7/3 = 162/30 - 70/30 = 92/30 = 3 2/30,
2) 3 2/30 : 7 2/3 = 92/30 : 23/3 = 92/30 * 3/23 = 92/230 = 4/10 = 2/5 (или 0,4)