Table:
0
A
B
C
1
Year ended March 31,
2
2018
2017
3
Net revenue:
4
Products
26.5%
30.0%
5
Support, maintenance and subscription services
54.2
49.6
6
Professional services
19.3
20.4
7
Total net revenue
100.0
100.0
8
Cost of goods sold:
9
Products (inclusive of developed technology amortization)
20.7
22.1
10
Support, maintenance and subscription services
13.1
13.3
11
Professional services
15.6
14.6
12
Total cost of goods sold
49.4
50.0
13
Gross profit
50.6
50.0
14
Operating expenses:
15
Product development
21.9
22.8
16
Sales and marketing
14.2
16.3
17
General and administrative
18.9
15.6
18
Depreciation of fixed assets
2.1
1.9
19
Amortization of intangibles
1.5
1.1
20
Restructuring, severance and other charges
1.4
1.2
21
Legal settlements
0.1
0.1
22
Operating loss
(9.5)%
(8.9)%

Questions and formulas:
Question: What was the increase / (decrease) in the percentage of Professional services of net revenue from 2017 to 2018?
Formula: B6 - C6
Formula2: B6 - C6
Level: Calculation