Total number of hours she schduled to play the game = 3 hours.
Let us convert mixed fraction into improper fraction
Duration of each round = .
In order to find the number of rounds Nicole can play, we need to divide total number of hours by duration of each round.
÷
Converting division sign into multiplication flips the second fraction.
Crossing out 12 by 4, we get 3 on the top of second fraction.
Because problem is about number of rounds.
So, total number of round would be 5.