PSLE At first, Elyse had 51 stamps and some pens. After she gave away 21 stamps and 25% of the pens, she had a total of 42 stamps and pens. How many pens did Elyse have at first?
|
Stamps |
Pens |
Total |
Before |
51 |
4 u |
|
Change |
- 21 |
- 1 u |
|
After |
30 |
3 u |
42 |
25% =
25100 =
14 Number of stamps that Elyse left
= 51 - 21
= 30
Number of pens that Elyse left
= 42 - 30
= 12
3 u = 12
1 u = 12 ÷ 3 = 4
Number of pens that Elyse had at first
= 4 u
= 4 x 4
= 16
Answer(s): 16