There were some pens in Bag H and Bag J. After Dylan transferred
13 of the pens from Bag H to Bag J, the ratio of the number of pens in Bag H to that in Bag J changed to 1 : 7. Find the ratio of the numbers of pens in Bag J to the number of pens in Bag H at first.
|
Bag H |
Bag J |
Before |
3x1 = 3 u |
13 u |
Change |
- 1x1 = - 1 u |
+ 1 u |
After |
2x1 = 2 u |
|
Comparing Bag H and Bag J in the end |
1x2 = 2 u |
7x2 = 14 u |
The number of pens in Bag H in the end is repeated. Make the number of pens in Bag H in the end the same. LCM of 2 and 1 is 2.
At first
Bag J : Bag H
13: 3
Answer(s): 13: 3