Erika had 154 more pens than Jane. After Jane gave away
13 of her pens, Erika had five times as many pens as Jane. How many pens did Jane have at first?
| |
Erika |
Jane |
Comparing Erika
and Jane at first |
154 more |
|
| Before |
10 u |
3 u |
| Change |
|
- 1 u |
| After |
|
2 u |
Comparing Erika
and Jane in the end |
5x2 =
10 u |
1x2 =
2 u |
The number of pens that Erika had at first and in the end remains unchanged. Make the number of pens that Erika had the same. LCM of 10 and 5 is 10.
Number of pens that Erika had more than Jane at first
= 10 u - 3 u
= 7 u
7 u = 154
1 u = 154 ÷ 7 = 22
Number of pens that Jane had at first
= 3 u
= 3 x 22
= 66
Answer(s): 66
