This question involves reverse percentages
We will call the students x, for the time being.
This means that Latrice did: x* 0.25= 51. Note that I am using the only students that chose summer, this means that there are others who chose other seasons but we arnt given the data. So, rearranging x= 51/0.25. Which equals 204.
Therefore this means that there are a minimum of 204 students in seventh grade. However, we are asked to predict, so we can say there are 204 students in the sevenh grade