Dart Group Corp. has reported that its net income per share for the quarter that ended Jan. 31 dropped by nearly 97 percent.

The principal cause of the decline was a sharp drop in the earnings of Landover-based Trak Auto Corp. Trak, which operates a nationwide chain of stores selling discount automobile parts and accessories, reported a $4.2 million loss in the quarter.

Dart owns 69 percent of Trak, a 54 percent stake in Crown Books and a majority share of Shoppers Food Warehouse.

Three months ended 1/31/91

.. .. .. .. .. Revenue.. .. .. .. Net.. .. .. Share

'91.. .. .. ..302,457,000. .. .. 154,000. .. 0.08

'90.. .. .. ..280,193,000. .. .4,708,000. ..2.48

% change .. .. +7.9.. .. .. .. ..-96.7. .. .. -96.8

12 months ended 1/31/91

.. .. .. .. .. Revenue.. .. .. .. Net.. .. .. Share

'91.. .. .. ..1,083,583,000.. ..8,254,000..4.42

'90.. .. .. ..943,050,000... ..11,677,000.. 6.15

% change .. .. +14.9. .. .. .. ..-29.3. .. .. -28.1