The number of chocolate chip shortbreads Billy baked was
38 of the total number of shortbreads. After baking another 216 chocolate chip shortbreads, the number of chocolate chip shortbreads became
67 of the total number of shortbreads. How many shortbreads did she bake at first?
| |
Chocolate chip shortbreads |
Other shortbreads |
Total shortbreads |
| Before |
3 u |
5 u |
8 u |
| Change |
+ 216 |
|
|
| After |
6x5 =
30 u |
1x5 =
5 u |
7x5 =
35 u |
The number of other shortbreads remains unchanged. Make the number of other shortbreads the same. LCM of 5 and 1 is 5.
Number of more chocolate chip shortbreads baked
= 30 u - 3 u
= 27 u
27 u = 216
1 u = 216 ÷ 27 = 8
Number of shortbreads that Billy baked at first
= 8 u
= 8 x 8
= 64
Answer(s): 64
