Question

In one fifth grade class 1/5 of the students wear glasses, and 1/4 wear contact lenses. What fraction of the class has corrected vision?​

Answer 1

9/20 would be the answer to your question

Answer 2

Answer: 9/20

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Step-by-step explanation:

We add up the fractions given

1/5 + 1/4

4/20 + 5/20

(4+5)/20

9/20

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An example:

Let's say there are 20 students.

• 1/5 of 20 = (1/5)*20 = 4 students have glasses
• 1/4 of 20 = (1/4)*20 = 5 students wear contacts

Assume that those who wear glasses do not wear contacts, and vice versa. In other words, assume someone doesn't use both types.

If that assumption holds up, then 4+5 = 9 students wear corrected vision of some sort. So that's how we can arrive at the answer of 9/20 as the fraction of corrected vision students.