McDonald's is losing ground to rivals among low-income fast-food diners, according to recent data. Spending by low-income guests at the Golden Arches declined 2.4% year-over-year during the company's latest quarter, said consumer analytics company Numerator. The firm defines "low-income guests" as those from households making $40,000 or less a year. The drop is McDonald's first quarterly decline with low-income guests in the past year and amounts to roughly $310 million in lost sales, Numerator said on Tuesday. Rival fast-food chain Burger King, meanwhile, notched a 0.3% gain over the same period. The data is the latest sign that McDonald's is struggling to attract diners, especially in a K-shaped economy. Read more about how McDonald's is losing sales at the link in our bio. Story by Alex Bitter (Credit: Getty Images) #McDonalds #BurgerKing #fastfood