Evaluating the Efficacy and Safety of PT027 Compared With PT007 Administered As Needed in Participants 12 to < 18 Years of Age With Asthma

This is a randomized, double-blind, multicenter, parallel-group Phase IIIb study with a fixed treatment period of 52 weeks. The study will consist of 3 periods: 1. Screening period (7 to 28 days) 2. Treatment period of 52 weeks 3. Safety follow-up period (7 to 14 days after the end of treatment \[EOT\] visit) Participants who meet the eligibility criteria will be randomly assigned to BDA MDI 160/180 micrograms (μg) or AS MDI 180 μg treatment groups in a 1:1 ratio on top of their own usual maintenance therapy during treatment period. This study will also include a pharmacokinetic (PK) sub-study with single visit scheduled after the safety follow-up visit in the main study. During PK sub-study, single dose of open-label BDA MDI 160/180 μg will be administered.