Make a template for the last plank next to the tub. Place a piece of craft paper into the area where the last piece of flooring will lay. Lay the paper so the edge fits next to the last plank you laid, and the extra paper folds up the side of the tub.
Run a pencil along the paper at the base of the tub.
Cut the pattern out of the craft paper using scissors.
Place the pattern on your laminate floor and mark the pattern onto the laminate.
Cut the pattern out of the laminate using a jigsaw. Cut carefully so you create a straight edge and cut on the proper edge. If the last plank laid had a groove, you will need to cut the groove side of the new plank.