The number of cherry cookies Justin baked was
25 of the total number of cookies. After baking another 117 cherry cookies, the number of cherry cookies became
56 of the total number of cookies. How many cookies did she bake at first?
| |
Cherry cookies |
Other cookies |
Total cookies |
| Before |
2 u |
3 u |
5 u |
| Change |
+ 117 |
|
|
| After |
5x3 =
15 u |
1x3 =
3 u |
6x3 =
18 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 cherry cookies baked
= 15 u - 2 u
= 13 u
13 u = 117
1 u = 117 ÷ 13 = 9
Number of cookies that Justin baked at first
= 5 u
= 5 x 9
= 45
Answer(s): 45
