Shaft Speeds in G/H/-T
It's even more confusing than some might think.
The percentage / shaft speeds relations quoted previously are purely reference numbers, and are not the actual operating limits. (I believe that these RPMs were the originally predicted operating speeds for the RB211-22B. Actual engine data showed that the operating limits would be different, but for convenience, the limits are quoted as percentages.)
So, for the RB211-524G/H/-T
Reference Speeds
100% HP = 10,611 rpm
100% IP = 7,000 rpm
100% LP= 3,900 rpm
MTO Operating Limits
HP Speed = 99.2%
IP Speed = 107.7%
LP Speed = 110.5% (i.e. 1.105 x 3900 = 4309.5 rpm)
(There are also Max Continuous and Max Overspeed / Overtemp limits, but lets not add to the confusion.)
The equivalent Trent 900 data you should find in the TCDS on the EASA site.
Hope This Helps.