Table:
|  | 2019 (a) | 2018(b) | 2017(c) | 2016(d)(f) | 2015 (e)(f) |
| --- | --- | --- | --- | --- | --- |
| Summary of Operations: |  |  |  |  |  |
| Net sales | $2,380.2 | $2,157.7 | $1,797.6 | $1,813.4 | $2,226.7 |
| Operating income | $241.4 | $189.3 | $121.5 | $70.8 | $119.3 |
| Net income | $167.0 | $188.5 | $47.0 | $11.3 | $58.7 |
| Financial Position at Year-End: |  |  |  |  |  |
| Cash and cash equivalents | $27.0 | $56.2 | $66.3 | $82.0 | $70.0 |
| Total assets | $3,187.8 | $3,007.0 | $2,878.1 | $2,794.3 | $2,902.6 |
| Long-term debt, net of current portion | $550.6 | $545.7 | $550.0 | $611.3 | $603.8 |
| Per Common Share: |  |  |  |  |  |
| Net earnings: |  |  |  |  |  |
| Basic | $3.46 | $3.96 | $0.99 | $0.23 | $1.11 |
| Diluted | $3.43 | $3.92 | $0.99 | $0.23 | $1.11 |
| Cash dividend-common | $0.80 | $0.72 | $0.72 | $0.72 | $0.72 |
| Weighted Average Common Shares outstanding: |  |  |  |  |  |
| Basic | 47.7 | 47.2 | 47.0 | 48.1 | 52.6 |
| Diluted | 48.1 | 47.6 | 47.1 | 48.2 | 52.7 |
Paragraphs:
Item 6. Selected Financial Data
Five-Year Financial Summary in millions, except per share data (Fiscal years ended June 30,)
(a) Fiscal year 2019 included $1.2 million of acquisition-related costs related to LPW Technology Ltd. See Note 4 in the Notes to the Consolidated Financial Statements included in Item 8. “Financial Statements and Supplementary Data” of this report.
(b) Fiscal year 2018 included $68.3 million of discrete income tax net benefits related to the U.S. tax reform and other legislative changes. See Note 17 in the Notes to the Consolidated Financial Statements included in Item 8. “Financial Statements and Supplementary Data” of this report.
(c) Fiscal year 2017 included $3.2 million of loss on divestiture of business. See Note 4 in the Notes to the Consolidated Financial Statements included in Item 8. "Financial Statements and Supplementary Data" of this report.
(d) Fiscal year 2016 included $22.5 million of excess inventory write-down charges, $12.5 million of goodwill impairment charges and $18.0 million of restructuring and impairment charges including $7.6 million of impairment of intangible assets and property, plant and equipment and $10.4 million of restructuring costs related primarily to an early retirement incentive and other severance related costs.
(e) Fiscal year 2015 included $29.1 million of restructuring costs related principally to workforce reduction, facility closures and write-down of certain assets.
(f) The weighted average common shares outstanding for fiscal years 2016 and 2015 included 5.5 million and 0.9 million less shares, respectively, related to the share repurchase program authorized in October 2014. During the fiscal years ended June 30, 2016 and 2015, we repurchased 3,762,200 shares and 2,995,272 shares, respectively, of common stock for $123.9 million and $124.5 million, respectively.
See Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” for discussion of factors that affect the comparability of the “Selected Financial Data”.
Question:
What was the change in operating income in 2019 from 2018?
Answer: $241.4-$189.3 = 52.1