Can u please explain the outcome figure indicate for ?

1.Debt ratio

2015 = 0.50

2016 = 0.70

increased + 0.20

2.Working Capital

2015 = 1,600,000

2016 = 1,200,000

increased -400,000

3.Total asset turnover

2015 = 3

2016 = 4

increased 1

4.Return on invested capital

2015 =0.5

2016 = 0.6

decreased - 0.1

Thanks