Yen had 63 more stamps than Penelope. After Penelope gave away
38 of her stamps, Yen had thrice as many stamps as Penelope. How many stamps did Penelope have at first?
| |
Yen |
Penelope |
Comparing Yen and
Penelope at first |
63 more |
|
| Before |
15 u |
8 u |
| Change |
|
- 3 u |
| After |
15 u |
5 u |
Comparing Yen and
Penelope in the end |
3x5 =
15 u |
1x5 =
5 u |
Number of stamps that Penelope had in the end is repeated. Make the number of stamps that Penelope had in the end the same. LCM of 1 and 5 is 5.
Number of stamps that Yen had at first = 15 u
Number of stamps that Yen had more than Penelope at first
= 15 u - 8 u
= 7 u
7 u = 63
1 u = 63 ÷ 7 = 9
Number of stamps that Penelope had at first
= 8 u
= 8 x 9
= 72
Answer(s): 72
