9/15 = 60%

Answers:
Top row: Timelines/Descent Into Evil Ironhide, BW Ironhide, Power Master Ironhide, RiD Ironhide
Centre row: Energon Ironhide, Animated Ironhide, Gobot Ironhide, Movie Ironhide, Animated Ironhide (Japan - it's what Bulkhead was called)
Bottom row: Micron Legend Ironhide (JP name for Armada Demolishor), War Within Ironhide, War For Cybertron Ironhide, Armada Ironhide (Terrorsaur's Mini-Con), G1