Complex sentence: In the first quarter of 2015, the market situation of Lubelski Węgiel has worsened--coal sales fell by 12.5 percent, its extraction--by 11 percent, and net profit--by 47.8 percent, which resulted in announcing plans to cut jobs and investment.
Split into simpler sentences: In the first quarter of 2015, the market situation of Lubelski Węgiel worsened. Coal sales fell by 12.5 percent, its extraction by 11 percent, and net profi--by 47.8 percent, which resulted in announcing plans to cut jobs and investment.