Table:
| (in millions, except per share data) | 2019 | 2018 | 2017 |
| --- | --- | --- | --- |
| Revenues | $1,177.2 | $1,114.0 | $1,051.6 |
| Adjusted Revenues(1) | $1,177.7 | $1,116.5 | $1,056.1 |
| Earnings before equity in losses of unconsolidated affiliates | $182.8 | $168.5 | $254.2 |
| Net earnings(2) | $108.8 | $168.5 | $254.2 |
| Net earnings margin | 9.2% | 15.1% | 24.2% |
| Net earnings attributable to Black Knight | $108.8 | $168.5 | $182.3 |
| Net earnings attributable to Black Knight, per diluted share | $0.73 | $1.14 | $1.47 |
| Adjusted Net Earnings(1) | $295.4 | $277.9 | $209.6 |
| Adjusted EPS(1) | $1.99 | $1.87 | $1.38 |
| Adjusted EBITDA(1) | $583.4 | $542.5 | $505.8 |
| Adjusted EBITDA Margin(1) | 49.5% | 48.6% | 47.9% |
Paragraphs:
(1) For a description and reconciliation of non-GAAP financial measures presented in this document, please see the Non-GAAP Financial Measures page, or visit the Black Knight Investor Relations website at https://investor.blackknightinc.com.
(2) In 2019, the effect of our indirect investment in The Dun and Bradstreet Corporation was a reduction of Net earnings of $73.9 million primarily due to the effect of its purchase accounting adjustments, restructuring charges and other non-operating charges. In 2017, Net earnings includes a one-time, non-cash net tax benefit of $110.9 million related to the revaluation of our deferred income tax assets and liabilities as a result of the Tax Cuts and Jobs Act of 2017 (the “Tax Reform Act”).
Question:
What was the percentage change in the Net earnings margin between 2017 and 2019?
Answer: 9.2-24.2 = -15