Like glucose, galactose mutarotates when it dissolves in water. The specific rotation of -D-galactopyranose is +150.7o, and

Like glucose, galactose mutarotates when it dissolves in water. The specific rotation of α-D-galactopyranose is +150.7o, and that of the β anomer is + 52.8o. When either of the pure anomers dissolves in water, the specific rotation gradually changes to + 80.2o. Determine the percentages of the two anomers present at equilibrium.