Table:
0
A
B
C
D
1
Year Ended December 31,
2
(in thousands of $)
2019
2018
2017
3
Realized gain on oil derivative instrument
13,089
26,737
0
4
Unrealized (loss)/gain on oil derivative instrument 
(39,090)
(9,970)
15,100
5
(26,001)
16,767
15,100

Questions and formulas:
Question: What was the change in realized gain on oil derivative instrument from 2017 to 2018?
Formula: C3 - D3
Formula2: C3 - D3
Level: Calculation
Question: What was the percentage change in total realized and unrealized (loss)/ gain on the oil derivative instrument from 2017 to 2018?
Formula: (C5 - D5)/D5
Formula2: (C5 - D5)/D5
Level: Calculation