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4 November, 20:57

Seventy percent of the 100 students in middle school cafeteria bought their lunch sone of the students that brought there own lunch leave the cafeteria to attend a assembly now only 60% of the remaining students bought their lunch how many students are remaining in the cafeteria

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  1. 4 November, 21:08
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    So we solve for each

    70% of 100=70

    students who didn't buy lunch=100-70=30

    some of the 70 left so that the students who bought lunch, are 60% of those who are left

    we know that the students who didn't buy lunch didn't change number so therefor

    100% of students left-60%=40% = students that didn't buy lunch=30 so

    40%=30

    20%=15

    100%=75

    there were 75 students lfet in the cafeteria
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