The number of apple cookies Carl baked was
25 of the total number of cookies. After baking another 64 apple cookies, the number of apple cookies became
67 of the total number of cookies. How many cookies did she bake at first?
| |
Apple cookies |
Other cookies |
Total cookies |
| Before |
2 u |
3 u |
5 u |
| Change |
+ 64 |
|
|
| After |
6x3 =
18 u |
1x3 =
3 u |
7x3 =
21 u |
The number of other cookies remains unchanged. Make the number of other cookies the same. LCM of 3 and 1 is 3.
Number of more apple cookies baked
= 18 u - 2 u
= 16 u
16 u = 64
1 u = 64 ÷ 16 = 4
Number of cookies that Carl baked at first
= 5 u
= 5 x 4
= 20
Answer(s): 20
