Ian had some pastries.
47 of them were croissants. The rest were shortbreads. He sold
25 of the croissants and 16 shortbreads. In the end, he had 92 pastries left. How many pastries did he sell?
| |
Croissants |
Shortbreads |
Comparing pastries
at first |
4x5 =
20 u |
3x5 =
15 u |
Before
|
5x4 =
20 u |
15 u |
Change
|
- 2x4 =
- 8 u |
- 16 |
After
|
3x4 =
12 u |
15 u - 16 |
The number of croissants at first is repeated. Make the number of croissants at first the same. LCM of 4 and 5 is 20.
Total number of pastries left
= 12 u + 15 u - 16
= 27 u - 16
27 u - 16 = 92
27 u = 92 + 16
27 u = 108
1 u = 108 ÷ 27 = 4
Number of pastries that Ian sold
= 8 u + 16
= 8 x 4 + 16
= 32 + 16
= 48
Answer(s): 48
