PSLE At first, Kimberly had 57 cards and some erasers. After she gave away 24 cards and 40% of the erasers, she had a total of 54 cards and erasers. How many erasers did Kimberly have at first?
|
Cards |
Erasers |
Total |
Before |
57 |
5 u |
|
Change |
- 24 |
- 2 u |
|
After |
33 |
3 u |
54 |
40% =
40100 =
25 Number of cards that Kimberly left
= 57 - 24
= 33
Number of erasers that Kimberly left
= 54 - 33
= 21
3 u = 21
1 u = 21 ÷ 3 = 7
Number of erasers that Kimberly had at first
= 5 u
= 5 x 7
= 35
Answer(s): 35