Lucas attends 8 classes each day. If each class is about 45 minutes long, about how long will Lucas have been
in school when he starts his fourth class of the day?

He will have 3 classes done before starting the fourth class.

3 classes x 45 minutes per class = 135 minutes.

1 hour = 60 minutes

134 minutes = 2 hours and 15 minutes.

Before the fourth class starts he was at school for 2 hours and 15 minutes

1/4 because there is 4 grades.