About 84{2879bc8f2cf0c7badc0ba0b91bc88170008fa0b1cee68ceb4afb7fd46d4bfeb9} want to lose weight and 34{2879bc8f2cf0c7badc0ba0b91bc88170008fa0b1cee68ceb4afb7fd46d4bfeb9} say that what they eat or how much they weigh is interfering with their happiness, according to Happify — a website and app that uses games and tasks based on scientific studies in …