The ratio of Isaiah's stickers to Layla's stickers at first was 2 : 5. After Isaiah gave Layla 102 stickers, the ratio of Isaiah's stickers to Layla's stickers is 1 : 4. What was the number of stickers they had in total?
|
Isaiah |
Layla |
Total |
Before |
2x5 = 10 u |
5x5 = 25 u
|
7x5 = 35 u |
Change |
- 102 |
+ 102 |
|
After |
1x7 = 7 u |
4x7 = 28 u |
5x7 = 35 u |
Number of stickers that Isaiah gave Layla
= 10 u - 7 u
= 3 u
3 u = 102
1 u = 102 ÷ 3 = 34
Total number of stickers that they had
= 35 u
= 35 x 34
= 1190
Answer(s): 1190