Jerome has 1/4 of the groups video games at his house. Mario has 2/5 of the groups video games at his house. What fraction of video the groups video games is either at Jerome's house or Mario's house?
make the denominators the same 20 and 20. then multiply 1 by 5 and 2 by 4
5/20 and 8/20 then add 5 and 8 and you would get 13 so your answer is 13/20