This is a randomized, multicenter, double blind, parallel-group study evaluating the efficacy of mometasone furoate/formoterol fumarate (MF/F) metered dose inhaler (MDI) 400/10 mcg twice daily (BID) compared with MF MDI 400 mcg BID for 12 weeks. Prior to the 12-week double-blind treatment period, subjects will receive open-label MF MDI 400 mcg BID for 2 to 3 weeks during the run-in period. Efficacy will be measured by the area under the curve from 0 to 12 hours [AUC](0-12 hr) of the change from Baseline to the Week 12 Endpoint in forced expiratory volume in one second (FEV1).