Table:
|  | As of December 31, |  |
| --- | --- | --- |
|  | 2019 | 2018 |
|  | (Dollars in millions) |  |
| Prepaid expenses | $274 | 307 |
| Income tax receivable | 35 | 82 |
| Materials, supplies and inventory | 105 | 120 |
| Contract assets | 42 | 52 |
| Contract acquisition costs | 178 | 167 |
| Contract fulfillment costs | 115 | 82 |
| Other | 59 | 108 |
| Total other current assets | $808 | 918 |
Paragraphs:
Other Current Assets
The following table presents details of other current assets in our consolidated balance sheets:
Question:
What is the change in contract assets in 2019?
Answer: 42-52 = -10