Table:
Year Ended December 31,	% Change

2019	2018	2019

(dollars in thousands)

Income tax benefit	$(12,586)	$(6,653)	89%

% of pre-tax loss	39%	20%

Answer the following question leveraging the table plus the background text, feel free to explain how you reached the answer, then present the result in JSON format {"answer": ["ANSWER"], "scale": "SCALE"} (leave scale empty if none).

Text:
Income Tax Provision (Benefit)
The income tax benefit for the year ended December 31, 2019 was $12.6 million or approximately 39% of pre-tax loss compared to an income tax benefit of $6.7 million or approximately 20% of pre-tax loss for the year ended December 31, 2018.
The income tax benefit for the year ended December 31, 2019 primarily related to the mix of pre-tax income among jurisdictions, discrete tax benefits related to stockbased compensation, and release of certain reserves for uncertain tax positions under ASC 740-10.
The income tax benefit for the year ended December 31, 2018 primarily related to a partial release of our valuation allowance and the mix of pre-tax income among jurisdictions, excess tax benefits related to stock-based compensation, and release of uncertain tax positions under ASC 740-10.

Question: What is the change in the % of pre-tax loss from 2018 to 2019?

39 - 20, therefore {"answer": "19", "scale": "percent"}