Pamela and Penelope collected pens. Pamela gave 25% of her pens to Penelope. As a result, Penelope's pens increased by 75%. If Pamela had 27 pens left, find the total number of pens the two girls had at first.
| |
Pamela |
Penelope |
Comparing the change
in Penelope's pens |
| Before |
4x3 =
12 u |
|
4x1 =
4 u |
| Change |
- 1x3 =
- 3 u |
+ 1x3 =
+ 3 u |
+ 3x1 =
+ 3 u |
| After |
3x3 =
9 u |
|
7x1 =
7 u |
25% =
25100 =
14 75% =
75100 =
34 The number of pens that Pamela gave to Penelope is repeated. Make the number of pens that Pamela gave to Penelope the same. LCM of 1 and 3 is 3.
Number of pens that Pamela had in the end = 9 u
9 u = 27
1 u = 27 ÷ 9 = 3
Number of pens that Pamela and Penelope had at first
= 12 u + 4 u
= 16 u
= 16 x 3
= 48
Answer(s): 48
