Zoe had 252 more chocolate bars than Yoko. Zoe used
78 of her chocolate bars and Yoko used
23 of her chocolate bars. In the end, Zoe had 3 times as much as Yoko. Find the number of chocolate bars that Yoko had at first.
|
Zoe |
Yoko |
Comparing Zoe and Parry at first |
252 more |
|
Before |
8x3 = 24 u |
3 u |
Change |
- 7x3 = - 21 u |
- 2 u |
After |
1x3 = 3 u |
1 u |
Comparing Zoe and Parry in the end |
3 u |
1 u |
The number of chocolate bars that Zoe had in the end is repeated. Make the number of chocolate bars that Zoe had in the end the same. LCM of 1 and 3 is 3.
Number of chocolate bars that Zoe had more than Yoko
= 24 u - 3 u
= 21 u
21 u = 252
1 u = 252 ÷ 21 = 12
Number of chocolate bars that Yoko had at first
= 3 u
= 3 x 12
= 36
Answer(s): 36