Question

Three classes have the same number of students. The teachers compared attendance on one Friday. Mr. Lopez had 92.5% of his students in the class. Mrs. Foster had 19/20 of her students in the class. In Ms. Kelly’s class, 0.9 of the students were present. Which teacher had the most students in the class that Friday?

Answer 1

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Suppose the number of students in one of the classes is :

`x`

So ;

`Mr.Lopez \: \: had \: \: (92.5)/(100)x \\`

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`Mrs.Foster \: \: had \: \: (19)/(20) x \\`

So :

`Mrs.Foster \: \: had \: \: (19 * 5)/(20 * 5) x \\`

`Mrs.Foster \: \: had \: \: (95)/(100)x \\`

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`Ms.Kelly \: \: had \: \: 0.9x`

`Ms.Kelly \: \: had \: \: (9)/(10) x \\`

`Ms.Kelly \: \: had \: \: (90)/(100) x \\`

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Compare :

`(95)/(100) x > (92.5)/(100) x > (90)/(100) x \\`

Thus :

`Mrs.Foster’s \: \: class \: > \: Mr.Lopez’s \: \: class \: > \: Ms.Kelly’s \: \: class \\`

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