The number of cherry shortbreads Ryan baked was
57 of the total number of shortbreads. After baking another 20 cherry shortbreads, the number of cherry shortbreads became
56 of the total number of shortbreads. How many shortbreads did she bake at first?
| |
Cherry shortbreads |
Other shortbreads |
Total shortbreads |
| Before |
5 u |
2 u |
7 u |
| Change |
+ 20 |
|
|
| After |
5x2 =
10 u |
1x2 =
2 u |
6x2 =
12 u |
The number of other shortbreads remains unchanged. Make the number of other shortbreads the same. LCM of 2 and 1 is 2.
Number of more cherry shortbreads baked
= 10 u - 5 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of shortbreads that Ryan baked at first
= 7 u
= 7 x 4
= 28
Answer(s): 28
