There were some pens in Bag Q and Bag R. After Michael transferred
15 of the pens from Bag Q to Bag R, the ratio of the number of pens in Bag Q to that in Bag R changed to 1 : 7. Find the ratio of the numbers of pens in Bag Q to the number of pens in Bag R at first.
|
Bag Q |
Bag R |
Before |
5x1 = 5 u |
27 u |
Change |
- 1x1 = - 1 u |
+ 1 u |
After |
4x1 = 4 u |
|
Comparing Bag Q and Bag R in the end |
1x4 = 4 u |
7x4 = 28 u |
The number of pens in Bag Q in the end is repeated. Make the number of pens in Bag Q in the end the same. LCM of 4 and 1 is 4.
At first
Bag Q : Bag R
5 : 27
Answer(s): 5 : 27