Usha had 38 more chocolate bars than Jean. Usha used
78 of her chocolate bars and Jean used
45 of her chocolate bars. In the end, Usha had 3 times as much as Jean. Find the number of chocolate bars that Jean had at first.
| |
Usha |
Jean |
Comparing Usha
and Parry at first |
38 more |
|
| Before |
8x3 =
24 u |
5 u |
| Change |
- 7x3 =
- 21 u |
- 4 u |
| After |
1x3 =
3 u |
1 u |
Comparing Usha
and Parry in the end |
3 u |
1 u |
The number of chocolate bars that Usha had in the end is repeated. Make the number of chocolate bars that Usha had in the end the same. LCM of 1 and 3 is 3.
Number of chocolate bars that Usha had more than Jean
= 24 u - 5 u
= 19 u
19 u = 38
1 u = 38 ÷ 19 = 2
Number of chocolate bars that Jean had at first
= 5 u
= 5 x 2
= 10
Answer(s): 10
