Questions & Answers about Praticamente tutti hanno già pagato.
Here praticamente means something like practically, almost, or more or less in the sense of nearly everyone.
So Praticamente tutti hanno già pagato means that almost everyone has already paid, not necessarily every single person.
Be careful: praticamente can also mean basically in other contexts, especially in spoken Italian. So it is often a close cousin of English practically, but the exact nuance depends on the sentence.
In this sentence, it clearly modifies tutti:
- praticamente tutti = practically everyone
Because tutti is plural, while tutto is singular.
- tutto = everything / all of it
- tutti = everyone / all of them / all
In this sentence, the idea is all the people or everyone, so the plural form tutti is needed.
Compare:
- Tutto è pronto. = Everything is ready.
- Tutti sono pronti. = Everyone is ready. / They are all ready.