Do you need to complete every activity to complete it 100%?

[Hazencoke]

Need to know thanks

[Hazencoke]

Bump

[Ulfhethnar]

I believe so or close to it as playing tennis or golf increases your completion percentage.

[backlynx]

Story Missions (69) - +50%

• 69 Story Missions (including Lesters Assassination Missions, available only to Franklin)
  
  Hobbies & Pastimes (42) - +10%
• Lap Dance at Strip Club
• Street Races (5)
• Sea Races (4)
• Shooting Range (score at least a bronze in 3 rounds with each weapon type)
• Flight School (score at least a bronze in all 12 lessons)
• All 13 Parachute Jumps
• Sports (Golf, Darts, Tennis, and 3 Triathlon Races)
• Off Road Races (6)
  
  Strangers & Freaks (20) - +10%
  
• Tonya (All towing missions)
• Beverly (All Paparazzo missions)
• Hao (Shift Work opens Street Races)
• Barry (Only Franklin's Missions)
• Fanatic (Only Franklin's Missions)
• Dom (All 4 Extreme Missions)
• Omega (Collect and return all 50 Spaceship Parts to Omega)
• Dreyfuss (Opens up after collecting all 50 Letter Scraps)
  
  Random Events (57) - +15%
  
• Complete 14 Random Events
  
  Miscellaneous (16) - +15%
  
• All 50 Spaceship Parts
• All 50 Letter Scraps
• 25 out of 50 Under The Bridges
• 8 out 15 Knife Flights
• 25 out of 50 Stunt Jumps
• Purchase 5 out of 25 money-generating properties
• Purchase a vehicle via the web
• Visit the cinema
• Walk and play with Chop
• Use a prostitute
• Booty call
• 1 out of 19 Shop Robberies
• 4 Friend activities (bar, strip club, movie and darts)
  
  Total 100%
  
  The following is NOT needed for 100%.
  
• All 12 Hidden Packages
• All Epsilon Tracts
• All Submarine Parts
• All Nuclear Waste Barrels
• 20 of the 25 purchasable properties
• 25 out of 50 Stunt Jumps
• 25 out of 50 Under The Bridge Challenges
• 7 out of 15 Knife Flights
• 18 out of 19 Shop Robberies
• All Hunting Challenges