PSLE Roshel had 55 post-it notes and Erika had 22 post-it notes. After Roshel gave some of her post-it notes to Erika, the number of post-it notes Roshel and Erika had was in the ratio 2 : 5. How many post-it notes did Roshel have in the end?
|
Roshel |
Erika |
Total |
Before |
55 |
22 |
77 |
Change |
- ? |
+ ? |
|
After |
2 u |
5 u |
7 u |
Total number of post-it notes
= 55 + 22
= 77
Total number of post-it notes
= 2 u + 5 u
= 7 u
7 u = 77
1 u = 77 ÷ 7 = 11
Number of post-it notes that Roshel had in the end
= 2 u
= 2 x 11
= 22
Answer(s): 22