Voters in Abington’s annual Town Meeting approved a proposed 0.75 percent local meals tax on Monday, a move expected to help provide revenue for several town projects. Though selectmen twice turned down the proposal, about three-quarters of the nearly 300 voters at Town Meeting voted in favor of the tax, which will take effect July 1. The state Department of Revenue estimates that the tax could bring up to $225,000 to the town annually. In the past, selectmen had expressed concerns about local restaurateurs losing business if diners opted to drive to a nearby town that did not have a meals tax.