6
6 divided by 198 is 1/33 or 0.0303030303
16.5
198.75
198
0.0909
21.3132
yes an easy way to find out is to take 198 and divide it by 6. this equals 33. sence there is no decmal, it is a multiple. however, if you took 198 and divided it by 7, you will get 28.29 wich shows you that 6 is a multiple and 7 is not.
0.0455
0.0404
198
198, 396, 594, 792, 990 +198 . . .