There were some erasers in Box K and Box L. After Flynn transferred
34 of the erasers from Box K to Box L, the ratio of the number of erasers in Box K to that in Box L changed to 2 : 9. Find the ratio of the numbers of erasers in Box L to the number of erasers in Box K at first.
|
Box K |
Box L |
Before |
4x2 = 8 u |
3 u |
Change |
- 3x2 = - 6 u |
+ 6 u |
After |
1x2 = 2 u |
|
Comparing Box K and Box L in the end |
2x1 = 2 u |
9x1 = 9 u |
The number of erasers in Box K in the end is repeated. Make the number of erasers in Box K in the end the same. LCM of 1 and 2 is 2.
At first
Box L : Box K
3: 8
Answer(s): 3: 8