问题如下：
Goodluck Company has tax burden os 70%, interest burden of 0.8 times, current ratio of 1.5 times, EBIT margin of 20%, asset turnover of 3 times, leverage ratio of 1.6 times. Please calculate the company's return on equity.
选项：
A.10.00%.
B.30.00%.
C.53.76%.
解释：
C is correct.
ROE = 0.7 x 0.8 x 0.2 x 3 x 1.6=0.5376=53.76%.
interest burden of 0.8 times 这个0.8 times怎么理解？
