What is half of eleven and three eights?

Half of eleven and three-eighths can be calculated by first converting eleven to a fraction. Eleven is equivalent to (11 = \frac{88}{8}). Adding three-eighths gives you (\frac{88}{8} + \frac{3}{8} = \frac{91}{8}). Finally, half of (\frac{91}{8}) is (\frac{91}{16}), which is (5.6875) in decimal form.