Mike20201
the only quibble is "times greater than".
I have presumed that if we represent quantity by multiplication, then "TIMES" binded with "AS" ... "AS" ought to be utilized.
Cardinal rule #1 of Sentence Correction: Do not invent rules!

The two constructions are both fine. Say, for example, that Dan has one child and Tim has nine children. We could say that Tim has
nine times as many children as Dan has. After all, 9*1 = 9. We could also say that the number of children Tim has is
nine times greater than the number of children Dan has. Either form is acceptable.
(Useless, nerdy footnote: some people would argue that "nine times as many as" is the same thing as saying "
eight times greater than." This is really not worth worrying about for the purposes of the GMAT, but
here's an example of a very long-winded internet conversation around this issue.)
The takeaway: Sometimes you get a choice between two constructions that mean slightly different things but that are both logical enough to hang onto. When that happens, move on to other decision points.
I hope that clears things up!