Certified GKH Gardening Expert
Check whether there are currently any young shoots growing from the soil. If so, dig down to expose their roots and cut them off from the rest of the roots. You can then transplant that section.
If not, remove the plant from the pot and divide its root system into 2 or 3 parts. Cut back most of the aboveground parts so the roots won't be stressed by having to support a lot of foliage. Then replant, following these tips to avoid transplant shock: