There were some stickers in Bag W and Bag X. After Ian transferred
25 of the stickers from Bag W to Bag X, the ratio of the number of stickers in Bag W to that in Bag X changed to 2 : 7. Find the ratio of the numbers of stickers in Bag W to the number of stickers in Bag X at first.
|
Bag W |
Bag X |
Before |
5x2 = 10 u |
17 u |
Change |
- 2x2 = - 4 u |
+ 4 u |
After |
3x2 = 6 u |
|
Comparing Bag W and Bag X in the end |
2x3 = 6 u |
7x3 = 21 u |
The number of stickers in Bag W in the end is repeated. Make the number of stickers in Bag W in the end the same. LCM of 3 and 2 is 6.
At first
Bag W : Bag X
10 : 17
Answer(s): 10 : 17