Missouri election authorities are predicting about one in four voters will cast ballots in next week’s primaries. Statewide voter turnout on Tuesday is projected at nearly 1.1 million people — about 27 percent of the almost 4.1 million Missourians registered to vote. The turnout projections are compiled from figures collected by the secretary of state’s office from each of Missouri’s 116 local election jurisdictions. They range from a projected high of 69 percent in northeast Missouri’s Knox County to a low of 9 percent in southern Missouri’s Howell County. The primaries include contested races for state and federal legislative seats as well as county offices. The ballot also features five proposed Constitutional Amendments, including one imposing a sales tax for transportation.