Percentage is related to Rate. Rate is related to Power. Disease can be used for Power. Disease is related to Transmission. 
Minor is a synonym of Infant. Infant is related to Baby. Baby is related to Sound. 
Percentage <--RelatedTo--> Rate <--RelatedTo--> Power <--UsedFor-- Disease <--RelatedTo--> Transmission 
Minor <--Synonym--> Infant <--RelatedTo--> Baby <--RelatedTo--> Sound 