A machine at a food-distribution factory fills boxes of rice. The distribution of the weights of filled boxes of rice has an approximately Normal distribution, with a mean of 28.2 ounces and a standard deviation of 0.4 ounces. What percentage of filled boxes of rice have a weight less than 27.9 ounces? Find the z-table here.

22.7%
38.2%
61.8%
77.3%