Donna spent:
$4 + $2.75 + $3.37 + $11.55 = $21.67
To find out how much change she had left from $25, we can subtract her total spent from $25:
$25 - $21.67 = $3.33
Therefore, Donna had $3.33 left over from $25.
If Donna shared 1/4 of her bag of chips with her 2 friends, then they split the remaining 3/4 of the bag. Assuming her bag of chips was a standard size, we can estimate that they each got about 1/4 of the bag:
1/4 of 3/4 is 3/16.
So, each of Donna's friends got approximately 3/16 of the bag of chips.