Answer:
72% (I think)
Explanation:
If you were talking about the weekend as in Saturday and Sunday and they were supposed to get 300 by the end of the next Saturday, then I'm pretty sure this is right. if they make 54 bracelets in two days, that means that they make 27 every day and they had 8 days to make them so 27 multiplied by 8 is 216 and 216 out of 300 is 72%. But I'm in 6th grade so I might have gotten this wrong :(