Table:
| (Amounts in thousands, except per share data and percentages) | 2019 | 2018 | 2017 |
| --- | --- | --- | --- |
| Bookings | $1,002,320 | $2,779,782 | $1,234,013 |
| Backlog | $3,400,952 | $4,064,451 | $2,536,499 |
| Sales | $1,496,475 | $1,202,898 | $1,107,709 |
| Sales growth % | 24% | 9% |  |
| Research & development | $50,132 | $52,398 | $52,652 |
| Operating income | $86,237 | $24,382 | $2,628 |
| Net income (loss) per share, continuing operations attributable to Cubic | $1.67 | $0.29 | $(0.95) |
| Adjusted EBITDA (1) | $146,594 | $104,561 | $87,470 |
| Adjusted EBITDA growth % | 40% | 20% |  |
| Adjusted earnings per share (1) | $3.13 | $2.19 | $1.62 |
| Adjusted earnings per share growth % | 43% | 35% |  |
| Cash dividend per share | $0.27 | $0.27 | $0.27 |
| Long-term debt, inclusive of current portion | $199,824 | $199,793 | $199,761 |
Paragraphs:
Financial and Operating Highlights
CONTINUING OPERATIONS
(1) See reconciliation of GAAP to non-GAAP financial measures tables in Management’s Discussion and Analysis of Financial Condition and Results of Operations in the Form 10-K.
Question:
What is the change in the adjusted EBITDA growth % from 2018 to 2019?
Answer: 40%-20% = 20