half.
He had 33 yds during the 1st drive of the 3rd quarter.
He had 21 yds during the 2nd drive of the 3rd quarter
He had 18 yds on the drive after the funmble
He had 55 yds on the last drive
(my math may be off)
Looks like he had slightly over half of his yards with Tonga in, if Tonga played on the 1st drive in the 3rd quarter