There were some erasers in Box K and Box L. After Simon transferred
14 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 |
25 u |
| Change |
- 1x2 =
- 2 u |
+ 2 u |
| After |
3x2 =
6 u |
|
Comparing Box K and
Box L in the end |
2x3 =
6 u |
9x3 =
27 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 3 and 2 is 6.
At first
Box L : Box K
25: 8
Answer(s): 25: 8
