There were some pencils in Packet R and Packet S. After Sean transferred
13 of the pencils from Packet R to Packet S, the ratio of the number of pencils in Packet R to that in Packet S changed to 3 : 4. Find the ratio of the numbers of pencils in Packet R to the number of pencils in Packet S at first.
|
Packet R |
Packet S |
Before |
3x3 = 9 u |
5 u |
Change |
- 1x3 = - 3 u |
+ 3 u |
After |
2x3 = 6 u |
|
Comparing Packet R and Packet S in the end |
3x2 = 6 u |
4x2 = 8 u |
The number of pencils in Packet R in the end is repeated. Make the number of pencils in Packet R in the end the same. LCM of 2 and 3 is 6.
At first
Packet R : Packet S
9 : 5
Answer(s): 9 : 5