math
posted by Brandyn .
In a third grade class 2/5 of the students wear glasses. What fraction of the students do not wear glasses?
If 16 students wear glasses, how many students are in the class altogether?

5/5  2/5 = ? students do not wear glasses
2/5 = 16/x
Cross multiply and divide
2x = 80
x = 40 students in the class
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