There were some erasers in Box B and Box C. After Xavier transferred
35 of the erasers from Box B to Box C, the ratio of the number of erasers in Box B to that in Box C changed to 1 : 8. Find the ratio of the numbers of erasers in Box B to the number of erasers in Box C at first.
|
Box B |
Box C |
Before |
5x1 = 5 u |
13 u |
Change |
- 3x1 = - 3 u |
+ 3 u |
After |
2x1 = 2 u |
|
Comparing Box B and Box C in the end |
1x2 = 2 u |
8x2 = 16 u |
The number of erasers in Box B in the end is repeated. Make the number of erasers in Box B in the end the same. LCM of 2 and 1 is 2.
At first
Box B : Box C
5 : 13
Answer(s): 5 : 13