We know from this that for every 30 perfect racket produced, 2 defective rackets are produced. When simplified, we find that for every 15 perfect rackets, 1 defective racket is produced. Set up the proportion.
1/15 = x/80
Cross multiply, you get the following.
15x = 80
Divide by 15.
x = 5.33
Because .33 rackets cannot be produced, approximately 5 defective rackets will be produced.
