Joelle had 144 more chocolate bars than Penelope. Joelle used
45 of her chocolate bars and Penelope used
34 of her chocolate bars. In the end, Joelle had 4 times as much as Penelope. Find the number of chocolate bars that Penelope had at first.
|
Joelle |
Penelope |
Comparing Joelle and Parry at first |
144 more |
|
Before |
5x4 = 20 u |
4 u |
Change |
- 4x4 = - 16 u |
- 3 u |
After |
1x4 = 4 u |
1 u |
Comparing Joelle and Parry in the end |
4 u |
1 u |
The number of chocolate bars that Joelle had in the end is repeated. Make the number of chocolate bars that Joelle had in the end the same. LCM of 1 and 4 is 4.
Number of chocolate bars that Joelle had more than Penelope
= 20 u - 4 u
= 16 u
16 u = 144
1 u = 144 ÷ 16 = 9
Number of chocolate bars that Penelope had at first
= 4 u
= 4 x 9
= 36
Answer(s): 36