Table:
| (in millions of €) | 2019 | 2018 |
| --- | --- | --- |
| Net income | 5,648 | 6,120 |
| Less: Other interest expenses / income, net 1 | (529) | (482) |
| Plus: SFS Other interest expenses / income | 763 | 721 |
| Plus: Net interest expenses related to provisions for pensions and similar |  |  |
| obligations | 148 | 164 |
| Less: Interest adjustments |  |  |
| (discontinued operations) | – | – |
| Less: Taxes on interest adjustments |  |  |
| (tax rate (flat) 30%) | (115) | (121) |
| (I) Income before interest after tax | 5,916 | 6,401 |
| (II) Average capital employed | 53,459 | 50,715 |
| (I) / (II) ROCE | 11.1 % | 12.6 % |
Paragraphs:
A.2.6 Calculation of return on capital employed
For purposes of calculating ROCE in interim periods, income before interest after tax is annualized. Average capital employed is determined using the average of the respective balances as of the quarterly reporting dates for the periods under review.
[1] Item Other interest expenses / income, net primarily consists of interest relating to corporate debt, and related hedging activities, as well as interest income on corporate assets.
Question:
What is the increase / (decrease) in income tax from 2018 to 2019?
Answer: -115 / -121 - 1 = -4.96