The number of apple cupcakes Tom baked was
27 of the total number of cupcakes. After baking another 138 apple cupcakes, the number of apple cupcakes became
56 of the total number of cupcakes. How many cupcakes did she bake at first?
| |
Apple cupcakes |
Other cupcakes |
Total cupcakes |
| Before |
2 u |
5 u |
7 u |
| Change |
+ 138 |
|
|
| After |
5x5 =
25 u |
1x5 =
5 u |
6x5 =
30 u |
The number of other cupcakes remains unchanged. Make the number of other cupcakes the same. LCM of 5 and 1 is 5.
Number of more apple cupcakes baked
= 25 u - 2 u
= 23 u
23 u = 138
1 u = 138 ÷ 23 = 6
Number of cupcakes that Tom baked at first
= 7 u
= 7 x 6
= 42
Answer(s): 42
