btw, I didn't see the options but here's the explanation
When you multiply by a part of a whole, a fraction, you are getting smaller. When you multiply by a number bigger than one, your product gets bigger. So, any number bigger than 2/3 works just fine
... rational because it can be expressed as a fraction (e.g., 41567/100000) ... not irrational for the same reason ... not whole (obviously) ... not integer (obviously)
