Washington was led by 33-year-old quarterback Billy Kilmer, who completed 120 out of 225 passes for 1,648 yards and a league leading 19 touchdowns during the regular season, with only 11 interceptions, giving him an NFL best 84.8 passer rating. Kilmer had started the first three games of the season, was replaced in game four by 38-year-old Sonny Jurgensen, then replaced Jurgensen when he was lost for the season with an Achilles tendon injury. Their powerful rushing attack featured two running backs. Larry Brown (running back) gained 1,216 yards (first in the NFC and second in the NFL) in 285 carries during the regular season, caught 32 passes for 473 yards, and scored 12 touchdowns, earning him both the NFL Most Valuable Player Award and the NFL Offensive Player of the Year Award. Running back Charley Harraway had 567 yards in 148 carries. Future Pro Football Hall of Fame wide receiver Charley Taylor and wide receiver Roy Jefferson provided the team with a solid deep threat, combining for 84 receptions, 1,223 receiving yards, and 10 touchdowns.
Question: How many more completed passes did Billy Kilmer have compared to incomplete passes ?
Answer: 15