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.

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) (Show Source): You can put this solution on YOUR website!
42 total
38 present on Friday
4 absent on Friday

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.

RELATED QUESTIONS
In a class of 36 students, 12 were absent on a Friday. What percent of the class was... (answered by Edwin McCravy)

On a particular day, 16% of the students were absent in the class.if 42 students were (answered by checkley79)

The total students in a class is40. 9 children were absent in a certain day.what is the... (answered by ankor@dixie-net.com)

On wet day 30% of the students were absent. If 294 were present how many... (answered by robertb)

One day 10% of the students enrolled in the school were absent. There were 1,620 students (answered by Boreal,ikleyn)

at school on Friday 3 out of 5 were wearing jeans. there were 600 students at school on... (answered by ewatrrr)

On a rainybday... 30% of the students absent and 54 students were present... Find out the (answered by ewatrrr,ikleyn)

There are 55 students enrolled in a class . In a very stormy day 40% of students were... (answered by JulietG)

A school has 960 students On the school prize giving day,75% of the students were... (answered by josgarithmetic,ikleyn)