Brandi read a total of 9 books over 3 months. If Brandi has read 12 books so far, how many months has she been with her book club? Assume the relationship is directly proportional.
Set up a proportion and solve for n.
|
| 9n
|
= |
12 × 3 |
Find the cross products |
|
| 9n
|
= |
36 |
Multiply |
|
| n |
= |
4 |
Divide both sides by 9 |
If Brandi has read 12 books so far, then she has been with her book club for 4 months.
