Ryan had some pastries.
25 of them were scones. The rest were cookies. He sold
35 of the scones and 9 cookies. In the end, he had 67 pastries left. How many more scones than cookies did he sell?
| |
Scones |
Cookies |
Comparing pastries
at first |
2x5 =
10 u |
3x5 =
15 u |
Before
|
5x2 =
10 u |
15 u |
Change
|
- 3x2 =
- 6 u |
- 9 |
After
|
2x2 =
4 u |
15 u - 9 |
The number of scones at first is repeated. Make the number of scones at first the same. LCM of 2 and 5 is 10.
Total number of pastries left
= 4 u + 15 u - 9
= 19 u - 9
19 u - 9 = 67
19 u = 67 + 9
19 u = 76
1 u = 76 ÷ 19 = 4
Number of more scones than cookies that Ryan sold
= 6 u - 9
= 6 x 4 - 9
= 24 - 9
= 15
Answer(s): 15
