Table:
0
A
B
C
D
E
F
1
(IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
Year Ended December 31,
2
2019(1)
2018(2)
2017(3)
2016(4)
2015(5)
3
Statement of Operations Data:
4
Revenues
$6,498
$6,515
$6,572
$6,309
$6,172
5
Depreciation and amortization(6)
756
675
640
603
574
6
Operating income/(loss)
(93)
(475)
1,214
1,130
1,098
7
Interest expense
397
394
374
333
311
8
Income/(loss) from continuing operations
(403)
(700)
440
507
575
9
Income/(loss) from continuing operations per common share (basic)
(1.17)
(2.00)
1.20
1.40
1.55
10
Income/(loss) from continuing operations per common share (diluted)
(1.17)
(2.00)
1.20
1.39
1.54
11
Cash dividends declared per common share
1.11
1.39
1.33
1.21
1.09
12
December 31,
13
(IN MILLIONS)
2019
2018
2017
2016
2015
14
Balance Sheet Data:
15
Total assets
$14,319
$15,179
$16,866
$15,730
$15,303
16
Long-term debt including finance leases
8,309
8,387
8,441
7,926
7,338

Questions and formulas:
Question: What is the percentage change in the operating loss from 2018 to 2019?
Formula: (B6-C6)/C6
Formula2: (B6-C6)/C6
Level: Calculation