Lee had some pastries.
47 of them were biscuits. The rest were puffs. He sold
35 of the biscuits and 6 puffs. In the end, he had 178 pastries left. How many more biscuits than puffs did he sell?
| |
Biscuits |
Puffs |
Comparing pastries
at first |
4x5 =
20 u |
3x5 =
15 u |
Before
|
5x4 =
20 u |
15 u |
Change
|
- 3x4 =
- 12 u |
- 6 |
After
|
2x4 =
8 u |
15 u - 6 |
The number of biscuits at first is repeated. Make the number of biscuits at first the same. LCM of 4 and 5 is 20.
Total number of pastries left
= 8 u + 15 u - 6
= 23 u - 6
23 u - 6 = 178
23 u = 178 + 6
23 u = 184
1 u = 184 ÷ 23 = 8
Number of more biscuits than puffs that Lee sold
= 12 u - 6
= 12 x 8 - 6
= 96 - 6
= 90
Answer(s): 90
