Trying to spend less than $15 at a fast-food joint and still get a full meal can be harder than finding the last fry at the bottom of the McDonald's bag. Chains like Taco Bell and McDonald's are leaning into the concept of value through cheaper meal deals and app-exclusive offers, especially as members of Gen Z — a key demographic for fast-food chains — continue to seek out the best value in terms of portion size, menu innovation, and variety. Business Insider's Erin McDowell set herself a $15 budget at McDonald's and Burger King — about the going rate for a burger, fries, and a drink at many fast-food chains — to see if she could get even more food for the same price. She tried to order as much food as possible using both chains' mobile apps for deals, which saved her money. See how her two meals at McDonald's and Burger King compared at the link in our bio. Story by Erin McDowell (Credit: Erin McDowell/Business Insider) #fastfood #mcdonalds #burgerking