How to decide on a % for advertising affiliate offers?

Hey guys,

I own am Instagram account about my country (Ireland), and it's growing quite steadily, really starting to pick up steam now.

Alot of highly engaged followers and likes and comments are growing every day.

A newly established company who offers all inclusive trips to my country for 10 days got in touch and says wants to advertise with me.

They don't want to pay by shoutout, instead to take me on as a partner and pay a % for my affiliate efforts.

They charge $3750 per trip per…

How to decide on a % for advertising affiliate offers?