The ratio of Michael's stickers to Julie's stickers at first was 3 : 5. After Michael gave Julie 120 stickers, the ratio of Michael's stickers to Julie's stickers is 1 : 3. What was the number of stickers they had altogether?
| |
Michael |
Julie |
Total |
| Before |
3x4 =
12 u |
5x4 =
20 u
|
8x4 =
32 u |
| Change |
- 120 |
+ 120 |
|
| After |
1x8 =
8 u |
3x8 =
24 u |
4x8 =
32 u |
Number of stickers that Michael gave Julie
= 12 u - 8 u
= 4 u
4 u = 120
1 u = 120 ÷ 4 = 30
Total number of stickers that they had
= 32 u
= 32 x 30
= 960
Answer(s): 960
