Table:
0
A
B
C
1
Year Ended December 31,
2
2019
2018
3
Sales
100.0 %
100.0 %
4
Gross profit
40.0
50.9
5
Operating expenses
33.1
27.0
6
Operating income from continuing operations
6.9
23.9
7
Other income (expense), net
1.6
0.1
8
Income from continuing operations before income taxes
8.5
24.0
9
Provision for income taxes
1.4
3.5
10
Income from continuing operations, net of income taxes
7.2 %
20.5 %

Questions and formulas:
Question: What was the change in percentage of sales represented by gross profit between 2018 and 2019?
Formula: B4-C4
Formula2: B4-C4
Level: Calculation
Question: What was the change in percentage of sales represented by net other income between 2018 and 2019?
Formula: B7-C7
Formula2: B7-C7
Level: Calculation
Question: What was the change in percentage of sales represented by provision for income taxes between 2018 and 2019?
Formula: B9-C9
Formula2: B9-C9
Level: Calculation