Ok, I will try and sum up what your asking with an example:
I have 3 componets that affecct my crew Morale; Pressed Crew Quarters (-2 Morale), Temple (+3 Morale), Ancient Life Sustainer (+2). So if I do the math
-2+3+2=3 so my Morale is now at 103%, and yes Morle and Population can go above 100%. Same thing applies to Population
One thing to remeber about RT is that its a game of MODIFIERS. So lets say that the Flying Dutchman gets hit with a nasty broadside and I take say 4 Points of Hull Damage, I will at this time reduce Hull by 4, Population by -4 and Morale by -4. So my Hull is at 66 Integrity, Population is down to 96% and Morale is down to 99%, makes sense?
Ship: The Flying Dutchman
Hull: Lunar-class cruiser
Dimensions: 5 km long, 0.8 km abeam at fins approx.
Crew: 95000 crew, approx.
Speed: 5 Manoeuvrability: +20 Crew Quality: 30
Detection: +25 Hull Integrity: 70 Crew Population: 100
Armour: 20 Turret Rating: 2 Crew Morale: 103%
Space: 75 Power: 75
Weapon Capacity: Prow 1, Port 2, Starboard 2
Essential Components: Modified Jovian Pattern Class 4 Drive, Ancient Life Sustainer, Bridge of Antiquity, Strelov 2 Warp Engine, Warps Bane Hull, Multiple Void Shield Array, Pressed Crew Quarters, Deep Void Auger Array
Supplemental Components: Teleportarium, 2 Port Mars Pattern Macrocannon Broadside, 2 Starboard Mars Pattern Macrocannon Broadside, Prow Starflare Lance, Cogitator Interlink, Barracks, Munitorium, Trophy Room, Cargo Hold and Lighter Bay, Compartmentalized Cargo Hold, Ship’s Stores, Augmented Retro-thrusters, Temple-shrine to the God Emporer