Table:
|  | 2019 | 2018 | 2018-2019 Change |
| --- | --- | --- | --- |
|  |  | (in millions) |  |
| Interest income | $(24.8) | $(26.7) | $1.9 |
| Interest expense | 23.1 | 31.3 | (8.2) |
| Other (income) expense, net | 29.5 | 1.4 | 28.1 |
Paragraphs:
Interest and Other
Interest income decreased by $1.9 million from 2018 to 2019 due primarily to lower cash and marketable securities balances in 2019. Interest expense decreased by $8.2 million from 2018 to 2019 due primarily to unrealized losses on equity marketable securities recognized in 2018. Other (income) expense, net increased by $28.1 million from 2018 to 2019 due primarily to a $15.0 million charge for the impairment of the investment in RealWear and an $11.5 million change in pension actuarial (gains) losses from a $3.3 million gain in 2018 to an $8.2 million loss in 2019.
Question:
What was the percentage change in Interest expense in 2019 from 2018?
Answer: (23.1-31.3)/31.3 = -26.2