There were some erasers in Bag J and Bag K. After Ian transferred
35 of the erasers from Bag J to Bag K, the ratio of the number of erasers in Bag J to that in Bag K changed to 3 : 5. Find the ratio of the numbers of erasers in Bag K to the number of erasers in Bag J at first.
|
Bag J |
Bag K |
Before |
5x3 = 15 u |
1 u |
Change |
- 3x3 = - 9 u |
+ 9 u |
After |
2x3 = 6 u |
|
Comparing Bag J and Bag K in the end |
3x2 = 6 u |
5x2 = 10 u |
The number of erasers in Bag J in the end is repeated. Make the number of erasers in Bag J in the end the same. LCM of 2 and 3 is 6.
At first
Bag K : Bag J
1: 15
Answer(s): 1: 15