Warren had some pastries.
25 of them were puffs. The rest were wafers. He sold
25 of the puffs and 17 wafers. In the end, he had 46 pastries left. How many more puffs than wafers did he sell?
| |
Puffs |
Wafers |
Comparing pastries
at first |
2x5 =
10 u |
3x5 =
15 u |
Before
|
5x2 =
10 u |
15 u |
Change
|
- 2x2 =
- 4 u |
- 17 |
After
|
3x2 =
6 u |
15 u - 17 |
The number of puffs at first is repeated. Make the number of puffs at first the same. LCM of 2 and 5 is 10.
Total number of pastries left
= 6 u + 15 u - 17
= 21 u - 17
21 u - 17 = 46
21 u = 46 + 17
21 u = 63
1 u = 63 ÷ 21 = 3
Number of more puffs than wafers that Warren sold
= 4 u - 17
= 4 x 3 - 17
= 12 - 17
= -5
Answer(s): -5
