Table:
|  | As of December 31, |  |
| --- | --- | --- |
|  | 2018 | 2019 |
| Unearned revenue | 38,680 | 48,183 |
| Accrued off-hire | 7,376 | 6,968 |
| Accrued purchases | 18,578 | 9,759 |
| Accrued interest | 38,107 | 36,746 |
| Other accruals | 24,709 | 34,586 |
| Total | 127,450 | 136,242 |
Paragraphs:
GasLog Ltd. and its Subsidiaries
Notes to the consolidated financial statements (Continued)
For the years ended December 31, 2017, 2018 and 2019
(All amounts expressed in thousands of U.S. Dollars, except share and per share data)
14. Other Payables and Accruals
An analysis of other payables and accruals is as follows:
The unearned revenue represents charter hires received in advance in December 2019 relating to the hire period of January 2020 for 22 vessels (December 2018: 17 vessels).
Question:
What was the change in accrued purchases from 2018 to 2019?
Answer: 9759 - 18578  = -8819