Macy's announced plans to close about 100 of its department stores, the latest effort to adapt to shifting consumer preferences for online shopping. Macy's did not disclose which stores it will close, but said most of them will close in early 2017. The move comes as Macy's revealed its second-quarter sales fell less than feared.  Macy's said its new strategy is to concentrate its financial firepower and talent on the best-performing locations.