Question

I know the reason of your coming late change into passive voice​

Answer 1

Passive Voice:

The reason of your coming late is known by me.

Explanation:

1) You should interchange the subject and object.

2) If the verb is present, the passive verb should be is/are + V3.

Answer 2

hey mate your answer↓

the reason of your coming late is known by me.

hope that it will help you!