There will be 450 students that will buy lunch today.
Fraction of students that'll buy lunch = 5/8.
Number of students in the school = 720
In order to get the number of students from the 720 students in the school will buy today, we have to multiply the fraction by the total students.
Number of students that'll buy lunch will now be = 5/8 × 720 = 450
Therefore, 450 students will buy lunch today.
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