In parts​ (a) through​ (c), determine which is the greater amount and by how much. ​a)​ $300 increased by 65​% or ​$600 decreased by 65​%. ​b)​ $300 increased by 80​% or ​$600 decreased by 80​%. ​c)​ $300 increased by 40​% or ​$600 decreased by 40​%. ​a) ▼ $ 300 increased by 65 % $ 600 decreased by 65 % is greater by ​$ nothing.