Ben had some pastries.
25 of them were puffs. The rest were cupcakes. He sold
34 of the puffs and 6 cupcakes. In the end, he had 57 pastries left. How many more puffs than cupcakes did he sell?
| |
Puffs |
Cupcakes |
Comparing pastries
at first |
2x2 =
4 u |
3x2 =
6 u |
Before
|
4x1 =
4 u |
6 u |
Change
|
- 3x1 =
- 3 u |
- 6 |
After
|
1x1 =
1 u |
6 u - 6 |
The number of puffs at first is repeated. Make the number of puffs at first the same. LCM of 2 and 4 is 4.
Total number of pastries left
= 1 u + 6 u - 6
= 7 u - 6
7 u - 6 = 57
7 u = 57 + 6
7 u = 63
1 u = 63 ÷ 7 = 9
Number of more puffs than cupcakes that Ben sold
= 3 u - 6
= 3 x 9 - 6
= 27 - 6
= 21
Answer(s): 21
