Question

we will work out the details of the agreement within a week(change into passive voice)

Answer 1

the details of the agreement would be worked by us within a week
I guess it's right

Answer 2

Hey there!

While converting from active voice to passive voice
1) Subject turns to object.
2) Object turns to subject.
3) by is used.
4) V3 form of verb is used.

Now, In the sentence; we will work out the details of the agreement within a week

In active voice,
Subject :- We.
Object :- The details of agreement.
Verb :- will work.

In passive voice :-
Subject :- The details of the agreement.
Object :- Us ( we)
Verb :- would be worked .

Now, The passive voice :- The details of the agreement would be worked by us within a week .