Question

the university has declared the results change into passive voice​

Answer 1

$\underline{\Huge\mathfrak{Voice\:change:-}}$

Active Voice :- The university has declared the results.

Passive Voice :- The results have been declared by the university.

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★$\underline{\texttt{Rule\:applied}}$★

IN AV

• SUBJECT - The university

• OBJECT - The results

IN PV

• SUBJECT - The results

• OBJECT - The university

The active sentence is in present perfect tense. So we need to attach been in PV.

The results is in plural. Hence, we use have indicating the same.