Posted by Brandyn on Monday, January 31, 2011 at 5:18pm.
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?

math  Ms. Sue, Monday, January 31, 2011 at 5:21pm
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