You have to set up a ratio. Pieces of candy to time.
I converted the time to to minutes.
285min : 60 min
246 pieces : x
Now you just cross multipy, and you get 51.78947368 .
So Tyrese can eat (depending on how your teacher wants you to round, usually if the number before the decimal is above a 5 your round up). So Tyrese can eat 52 pieces in an hour. However, it could mean how many pieces can she eat exactly, then you would use the number you got from the ratio or since Tyrese probably can't break a piece of candy into .78947368 piece, she can eat 51.
