There were some pencils in Packet X and Packet Y. After Carl transferred
13 of the pencils from Packet X to Packet Y, the ratio of the number of pencils in Packet X to that in Packet Y changed to 1 : 9. Find the ratio of the numbers of pencils in Packet Y to the number of pencils in Packet X at first.
|
Packet X |
Packet Y |
Before |
3x1 = 3 u |
17 u |
Change |
- 1x1 = - 1 u |
+ 1 u |
After |
2x1 = 2 u |
|
Comparing Packet X and Packet Y in the end |
1x2 = 2 u |
9x2 = 18 u |
The number of pencils in Packet X in the end is repeated. Make the number of pencils in Packet X in the end the same. LCM of 2 and 1 is 2.
At first
Packet Y : Packet X
17: 3
Answer(s): 17: 3