Elijah had some pastries.
58 of them were cupcakes. The rest were wafers. He sold
34 of the cupcakes and 15 wafers. In the end, he had 36 pastries left. How many more cupcakes than wafers did he sell?
| |
Cupcakes |
Wafers |
Comparing pastries
at first |
5x4 =
20 u |
3x4 =
12 u |
Before
|
4x5 =
20 u |
12 u |
Change
|
- 3x5 =
- 15 u |
- 15 |
After
|
1x5 =
5 u |
12 u - 15 |
The number of cupcakes at first is repeated. Make the number of cupcakes at first the same. LCM of 5 and 4 is 20.
Total number of pastries left
= 5 u + 12 u - 15
= 17 u - 15
17 u - 15 = 36
17 u = 36 + 15
17 u = 51
1 u = 51 ÷ 17 = 3
Number of more cupcakes than wafers that Elijah sold
= 15 u - 15
= 15 x 3 - 15
= 45 - 15
= 30
Answer(s): 30
