Table:
| Three months ended August 31, | 2019 (1) | 2018 (2) | Change | Change in constant currency | Foreign exchange impact |
| --- | --- | --- | --- | --- | --- |
| (in thousands of dollars, except percentages) | $ | $ | % | % | $ |
| Revenue | 583,673 | 566,184 | 3.1 | 2.7 | 2,427 |
| Operating expenses | 302,833 | 297,977 | 1.6 | 1.1 | 1,441 |
| Management fees – Cogeco Inc. | 5,230 | 4,796 | 9.0 | 9.0 | - |
| Adjusted EBITDA | 275,610 | 263,411 | 4.6 | 4.3 | 986 |
| Adjusted EBITDA margin | 47.2% | 46.5% |  |  |  |
Paragraphs:
OPERATING AND FINANCIAL RESULTS
(1) For the three-month period ended August 31, 2019, the average foreign exchange rate used for translation was 1.3222 USD/CDN.
(2) Fiscal 2018 was restated to comply with IFRS 15 and to reflect a change in accounting policy as well as to reclassify results from Cogeco Peer 1 as discontinued
operations. For further details, please consult the "Accounting policies" and "Discontinued operations" sections.
(3) Fiscal 2019 actuals are translated at the average foreign exchange rate of the comparable period of fiscal 2018 which was 1.3100 USD/CDN.
Question:
What was the increase / (decrease) in the revenue from three months ended August 31, 2018 to 2019?
Answer: 583673 - 566184 = 17489