Howard had some pastries.
47 of them were cookies. The rest were macarons. He sold
25 of the cookies and 15 macarons. In the end, he had 93 pastries left. How many pastries did he sell?
| |
Cookies |
Macarons |
Comparing pastries
at first |
4x5 =
20 u |
3x5 =
15 u |
Before
|
5x4 =
20 u |
15 u |
Change
|
- 2x4 =
- 8 u |
- 15 |
After
|
3x4 =
12 u |
15 u - 15 |
The number of cookies at first is repeated. Make the number of cookies at first the same. LCM of 4 and 5 is 20.
Total number of pastries left
= 12 u + 15 u - 15
= 27 u - 15
27 u - 15 = 93
27 u = 93 + 15
27 u = 108
1 u = 108 ÷ 27 = 4
Number of pastries that Howard sold
= 8 u + 15
= 8 x 4 + 15
= 32 + 15
= 47
Answer(s): 47
