Erika had 108 less chocolate bars than Jen. Jen used
67 of her chocolate bars and Erika used
23 of her chocolate bars. In the end, Jen had 3 times as much as Erika. Find the number of chocolate bars that Jen had at first.
| |
Jen |
Erika |
Comparing Jen
and Parry at first |
|
108 less |
| Before |
7x3 =
21 u |
3 u |
| Change |
- 6x3 =
- 18 u |
- 2 u |
| After |
1x3 =
3 u |
1 u |
Comparing Jen
and Parry in the end |
3 u |
1 u |
The number of chocolate bars that Jen had in the end is repeated. Make the number of chocolate bars that Jen had in the end the same. LCM of 1 and 3 is 3.
Number of chocolate bars that Erika had less than Jen
= 21 u - 3 u
= 18 u
18 u = 108
1 u = 108 ÷ 18 = 6
Number of chocolate bars that Jen had at first
= 21 u
= 21 x 6
= 126
Answer(s): 126
