PSLE At first, Vanessa had 55 stamps and some erasers. After she gave away 37 stamps and 30% of the erasers, she had a total of 81 stamps and erasers. How many erasers did Vanessa give away?
|
Stamps |
Erasers |
Total |
Before |
55 |
10 u |
|
Change |
- 37 |
- 3 u |
|
After |
18 |
7 u |
81 |
30% =
30100 =
310 Number of stamps that Vanessa left
= 55 - 37
= 18
Number of erasers that Vanessa left
= 81 - 18
= 63
7 u = 63
1 u = 63 ÷ 7 = 9
Number of erasers that Vanessa gave away
= 3 u
= 3 x 9
= 27
Answer(s): 27