there are 9 students who wear glassses. of the students who waer glassesor contact lenses,what percent are glasses
Incomplete information and garbled English.
This cannot be answered.
To find the percentage of students who wear glasses among those who wear glasses or contact lenses, you need to know the total number of students who wear glasses or contact lenses. Let's assume the total number of students who wear glasses or contact lenses is 20.
Out of the 9 students who wear glasses, divide this number by the total number of students who wear glasses or contact lenses and then multiply by 100 to find the percentage:
(9 / 20) * 100 = 45%
So, 45% of the students who wear glasses or contact lenses are wearing glasses.