“Dumbing down” is a phrase that refers to something that lacks a good intellectual and logical ability to rationalize. Mainly used as a metaphor to describe an aspect that warrants shortage of decent qualities, this is quite commonly applied to situations that involve the mention of mentally weak people.
“Reading” originates from the word read and is the present continuous form of the verb “read” that refers to the careful review of a written work with the objective to derive meaning or action. It is a formal word of the language and is also applied to refer to the habit of a person.
The word “sales” are put to use in multiple forms to describe the act of selling or transfer of some material property in exchange for money. Sell is the root of the word and the act also refers to the profession which is connected with selling.
The phrase “increased by” is a multiword item that refers to the rise or surge in a particular statistic. It is a verb cum usage of the word increase that also reads as amplified. The usage of this arrangement is quite formal and very figurative.
The multi-word item “compared to” is a relative assessment of the performance or association of two entities that may be numerical or non-numerical. The most common form of usage is in the customary sense to describe and evaluation or judgment in its simple form with the root in the word “compare”.