PSLE Yoko had 47 post-it notes and Eva had 23 post-it notes. After Yoko gave some of her post-it notes to Eva, the number of post-it notes Yoko and Eva had was in the ratio 2 : 5. How many post-it notes did Yoko have in the end?
|
Yoko |
Eva |
Total |
Before |
47 |
23 |
70 |
Change |
- ? |
+ ? |
|
After |
2 u |
5 u |
7 u |
Total number of post-it notes
= 47 + 23
= 70
Total number of post-it notes
= 2 u + 5 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Number of post-it notes that Yoko had in the end
= 2 u
= 2 x 10
= 20
Answer(s): 20