What is the likely charge on the metal ion with a complex whose formula is #[M(SO_4)(NH_3)_5]^+Cl^(-)#?
Well because the complex as written has a single chloride counterion, we can write..........
And the ammine ligands may be removed as neutral entities, whose removal causes no change to the charge of the complex.......
Note that all I have done here is to conserve CHARGE, and MASS. All of stoichiometry depends on these conservations.
Note, that looking at this question again, it was clearly formulated by someone who has not formally trained as a chemist. The