Sam had some pastries.
25 of them were cupcakes. The rest were croissants. He sold
25 of the cupcakes and 5 croissants. In the end, he had 142 pastries left. How many more cupcakes than croissants did he sell?
| |
Cupcakes |
Croissants |
Comparing pastries
at first |
2x5 =
10 u |
3x5 =
15 u |
Before
|
5x2 =
10 u |
15 u |
Change
|
- 2x2 =
- 4 u |
- 5 |
After
|
3x2 =
6 u |
15 u - 5 |
The number of cupcakes at first is repeated. Make the number of cupcakes at first the same. LCM of 2 and 5 is 10.
Total number of pastries left
= 6 u + 15 u - 5
= 21 u - 5
21 u - 5 = 142
21 u = 142 + 5
21 u = 147
1 u = 147 ÷ 21 = 7
Number of more cupcakes than croissants that Sam sold
= 4 u - 5
= 4 x 7 - 5
= 28 - 5
= 23
Answer(s): 23
