PSLE At first, Kathy had 57 cards and some beads. After she gave away 17 cards and 30% of the beads, she had a total of 61 cards and beads. How many beads did Kathy give away?
|
Cards |
Beads |
Total |
Before |
57 |
10 u |
|
Change |
- 17 |
- 3 u |
|
After |
40 |
7 u |
61 |
30% =
30100 =
310 Number of cards that Kathy left
= 57 - 17
= 40
Number of beads that Kathy left
= 61 - 40
= 21
7 u = 21
1 u = 21 ÷ 7 = 3
Number of beads that Kathy gave away
= 3 u
= 3 x 3
= 9
Answer(s): 9