PSLE Linda had 73 post-it notes and Winnie had 18 post-it notes. After Linda gave some of her post-it notes to Winnie, the number of post-it notes Linda and Winnie had was in the ratio 3 : 4. How many post-it notes did Linda have in the end?
|
Linda |
Winnie |
Total |
Before |
73 |
18 |
91 |
Change |
- ? |
+ ? |
|
After |
3 u |
4 u |
7 u |
Total number of post-it notes
= 73 + 18
= 91
Total number of post-it notes
= 3 u + 4 u
= 7 u
7 u = 91
1 u = 91 ÷ 7 = 13
Number of post-it notes that Linda had in the end
= 3 u
= 3 x 13
= 39
Answer(s): 39