There were some erasers in Packet E and Packet F. After Ryan transferred
15 of the erasers from Packet E to Packet F, the ratio of the number of erasers in Packet E to that in Packet F changed to 3 : 8. Find the ratio of the numbers of erasers in Packet E to the number of erasers in Packet F at first.
|
Packet E |
Packet F |
Before |
5x3 = 15 u |
29 u |
Change |
- 1x3 = - 3 u |
+ 3 u |
After |
4x3 = 12 u |
|
Comparing Packet E and Packet F in the end |
3x4 = 12 u |
8x4 = 32 u |
The number of erasers in Packet E in the end is repeated. Make the number of erasers in Packet E in the end the same. LCM of 4 and 3 is 12.
At first
Packet E : Packet F
15 : 29
Answer(s): 15 : 29