Answer:
The only quantity identified is "pans".
So let's follow the equation through, and learn how many pans each friend receives.
Explanation:
3 pans - 5/8 = 2 3/8 pans = 19/8 pans.
Herself and three friends is 4 people.
Each friend then receives one quarter of the remaining 19/8 pans.
Fractional multiplication is done left to right,
19/8 x 1/4 = 19/32 pans.
Each friend then receives 19/32 of a pan, or
0.59375 pans of brownies.