No. As a general rule, multiples cannot be smaller than the number they are compared to. 9 is a factor of 225. 225 is a multiple of 9.
225
If it's to be a multiple of 9 the its digits must sum to a multiple of 9. Squares under 225 are 196,169,144,121,100... 144 ie 12 squared (and 9 x 16) would seem to be the figure you're looking for.
The least common multiple of the numbers 25 and 9 is 225.
225/7 is an irrational decimal, so 225 is not a multiple of 7.
The LCM is: 225225
1, 3, 5, 9, 15, 25, 45, 75, 225 (1 x 225, 3 x 75, 5 x 45, 9 x 25, 15 x 15).
The least common multiple of 35 and 225 is 1575
The Least Common Multiple (LCM) for 375 225 is 1,125
25
9% of 225 = 0.09 * 225 = 20.25.
2.25 = 225/100 = 9/42.25 = 225/100 = 9/42.25 = 225/100 = 9/42.25 = 225/100 = 9/4
Least Common Multiple (LCM) for 168 225 is 12,600