Check - you may wish to glance at
this thread? Boeing (in that 'oldish' - 19/5/1997 - document, for 737 3-500, and presumably 6-900?) say initially
at least 40% and no need to reduce if greater; 'Acceptable' TOGA thrust setting by a/t at THR Hold is +/- 2%, and manual intervention
ONLY after the 2 stage a/t action is complete should be made to adjust to +1%/- 0% of target.