Answer:First, convert the mixed numbers to improper fractions: - 4 and 5/6 = (4 * 6 + 5) / 6 = 29/6- 2 and 1/6 = (2 * 6 + 1) / 6 = 13/6 Now subtract the fractions: 29/6 - 13/6 = 16/6 Simplify the resulting fraction: 16/6 = 8/3 Convert the improper fraction back to a mixed number: 8/3 = 2 and 2/3 Therefore, 4 and 5/6 - 2 and 1/6 = \boxed{2\frac{2}{3}}