erome has

1
4
of the group’s video games at his house. Mario has
2
5
of the group’s video games at his house. What fraction of the group’s video games is either at Jerome’s house or Mario’s house?

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1/4 + 2/5 = 5/20 + 8/20 = 13/20

To find the fraction of the group's video games that are either at Jerome's house or Mario's house, we first need to determine the total number of video games in the group.

Jerome has 1/4 of the group's video games at his house, and Mario has 2/5 of the group's video games at his house.

To find the total number of video games, we need to find the least common multiple (LCM) of 4 and 5. The LCM of 4 and 5 is 20.

Now, let's calculate the number of video games at Jerome's house:

Jerome has 1/4 of the group's video games, which is (1/4) * 20 = 5 video games.

Next, let's calculate the number of video games at Mario's house:

Mario has 2/5 of the group's video games, which is (2/5) * 20 = 8 video games.

To find the fraction of the group's video games at either Jerome's house or Mario's house, we add the number of video games at both places and divide by the total number of video games.

Total number of video games at Jerome's and Mario's house: 5 + 8 = 13

Therefore, the fraction of the group's video games at either Jerome's house or Mario's house is 13/20.