Table:
|  |  | 2019 | 2018 | 2017 |
| --- | --- | --- | --- | --- |
|  | Notes | €m | €m | €m |
| (Loss)/profit for the financial year |  | (7,644) | 2,788 | (6,079) |
| Loss from discontinued operations | 7 | 3,535 | 1,969 | 4,107 |
| (Loss)/profit for the financial year from continuing operations |  | (4,109) | 4,757 | (1,972) |
| Non-operating expense |  | 7 | 32 | 1 |
| Investment income |  | (433) | (685) | (474) |
| Financing costs |  | 2,088 | 1,074 | 1,406 |
| Income tax expense/(credit) | 6 | 1,496 | (879) | 4,764 |
| Operating (loss)/profit |  | (951) | 4,299 | 3,725 |
| Adjustments for: |  |  |  |  |
| Share-based payments and other non-cash charges |  | 147 | 128 | 95 |
| Depreciation and amortisation | 10, 11 | 9,795 | 10,409 | 11,086 |
| Loss on disposal of property, plant and equipment and intangible assets | 3 | 33 | 36 | 22 |
| Share of result of equity accounted associates and joint ventures |  | 908 | 59 | (47) |
| Impairment losses | 4 | 3,525 | – | – |
| Other expense/(income) |  | 148 | (213) | (1,052) |
| (Increase)/decrease in inventory |  | (131) | (26) | 117 |
| (Increase)/decrease in trade and other receivables | 14 | (31) | (1,118) | 308 |
| Increase/(decrease) in trade and other payables | 15 | 739 | 286 | (473) |
| Cash generated by operations |  | 14,182 | 13,860 | 13,781 |
| Net tax paid |  | (1,131) | (1,118) | (761) |
| Cash flows from discontinued operations |  | (71) | 858 | 1,203 |
| Net cash flow from operating activities |  | 12,980 | 13,600 | 14,223 |
Paragraphs:
18. Reconciliation of net cash flow from operating activities
The table below shows how our (loss)/profit for the year from continuing operations translates into cash flows generated from our operating activities.
Question:
What is the change of average net cash flow from operating activities between 2017-2018 and 2018-2019?
Answer: [(12980+13600)/2] - [(13600+14223)/2] = -621.5