Hey there!
To find how many rolls were sold in the morning, you must multiply 54, the total amount of rolls, by 1/6, the amount of the whole sold in the morning. This would be represented by this expression:
54*1/6
Now, simplify the expression to find how many rolls were collected in the morning:
54*1/6=54/6
54/6=9
Therefore, 9 rolls were sold in the morning.
Hope this helps and have a marvelous day! :)