There were some pens in Packet D and Packet E. After Zane transferred
35 of the pens from Packet D to Packet E, the ratio of the number of pens in Packet D to that in Packet E changed to 3 : 8. Find the ratio of the numbers of pens in Packet E to the number of pens in Packet D at first.
|
Packet D |
Packet E |
Before |
5x3 = 15 u |
7 u |
Change |
- 3x3 = - 9 u |
+ 9 u |
After |
2x3 = 6 u |
|
Comparing Packet D and Packet E in the end |
3x2 = 6 u |
8x2 = 16 u |
The number of pens in Packet D in the end is repeated. Make the number of pens in Packet D in the end the same. LCM of 2 and 3 is 6.
At first
Packet E : Packet D
7: 15
Answer(s): 7: 15