To determine the fractions of sales from books, music, and video games, we can summarize what you provided:
- Sales from books: \( \frac{7}{20} \)
- Sales from music: \( \frac{6}{20} \)
- Sales from video games: \( \frac{3}{20} \)
Now, let's add these fractions together to check if they sum to \( 1 \) (representing all sales):
\[ \text{Total Sales} = \frac{7}{20} + \frac{6}{20} + \frac{3}{20} \]
Combining these fractions:
\[ \text{Total Sales} = \frac{7 + 6 + 3}{20} = \frac{16}{20} = \frac{4}{5} \]
This means that these fractions of sales add up to \( \frac{4}{5} \).
This suggests that there is an additional \( \frac{1}{5} \) of sales that are unaccounted for. This could be sales from other categories not mentioned in your question.
In conclusion, the fractions of sales you provided correspond to the following:
- Books: \( \frac{7}{20} \)
- Music: \( \frac{6}{20} \)
- Video Games: \( \frac{3}{20} \)
And there is an unspecified \( \frac{4}{20} \) or \( \frac{1}{5} \) of sales that comes from other sources.