PSLE Vanessa had 55 bookmarks and Xuan had 17 bookmarks. After Vanessa gave some of her bookmarks to Xuan, the number of bookmarks Vanessa and Xuan had was in the ratio 4 : 5. How many bookmarks did Vanessa have in the end?
|
Vanessa |
Xuan |
Total |
Before |
55 |
17 |
72 |
Change |
- ? |
+ ? |
|
After |
4 u |
5 u |
9 u |
Total number of bookmarks
= 55 + 17
= 72
Total number of bookmarks
= 4 u + 5 u
= 9 u
9 u = 72
1 u = 72 ÷ 9 = 8
Number of bookmarks that Vanessa had in the end
= 4 u
= 4 x 8
= 32
Answer(s): 32