SOLUTION: In a a class of 42, 38 students were present on friday, what fraction of students were absent on Friday?, the correct answer written in the end of the book is 1/20, please explain.

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: In a a class of 42, 38 students were present on friday, what fraction of students were absent on Friday?, the correct answer written in the end of the book is 1/20, please explain.      Log On


   



Question 966715: In a a class of 42, 38 students were present on friday, what fraction of students were absent on Friday?, the correct answer written in the end of the book is 1/20, please explain.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
42 total
38 present on Friday
4 absent on Friday
4%2F42=highlight%282%2F21%29
The answer in the back of the book is incorrect.
No fraction of a class of 42 can have a denominator of 20 since 20 is not a factor of 42.