Answer:
Dr Unearned rent revenue 16,800
Cr Rent revenue 16,800
Step-by-step explanation:
Period 6 months
Period expired at year end which is from September to December = 4 months
December 31
Dr Unearned rent revenue 16,800
(4/6×25,200)
Cr Rent revenue 16,800
Unearned Rent Revenue was debited in order to reduced Liability while Rent Revenue was credited in order to increase revenue.