The ratio of Christian's stickers to Claire's stickers at first was 3 : 5. After Christian gave Claire 112 stickers, the ratio of Christian's stickers to Claire's stickers is 1 : 4. What was the number of stickers they had in all?
|
Christian |
Claire |
Total |
Before |
3x5 = 15 u |
5x5 = 25 u
|
8x5 = 40 u |
Change |
- 112 |
+ 112 |
|
After |
1x8 = 8 u |
4x8 = 32 u |
5x8 = 40 u |
Number of stickers that Christian gave Claire
= 15 u - 8 u
= 7 u
7 u = 112
1 u = 112 ÷ 7 = 16
Total number of stickers that they had
= 40 u
= 40 x 16
= 640
Answer(s): 640