Rachel made 66 tarts and croissants. After she gave 0.7 of the tarts and 0.75 of the croissants to her children, she was left with an equal number of tarts and croissants. How many croissants had she left?
| |
Tarts |
Croissants |
Before
|
10x1 =
10 u |
4x3 =
12 u |
Change
|
- 7x1 =
- 7 u |
- 3x3 =
- 9 u |
After
|
3x1 =
3 u |
1x3 =
3 u |
Comparing tarts and
croissants in the end |
1x3 =
3 u |
1x3 =
3 u |
0.7 =
710 0.75 =
75100 =
34 The number of tarts and croissants is the same in the end. Make the number of tarts and croissants in the end the same. LCM of 3 and 1 and 1 is 3.
Total number of tarts and croissants at first
= 10 u + 12 u
= 22 u
22 u = 66
1 u = 66 ÷ 22 = 3
Number of croissants that Rachel had left
= 3 u
= 3 x 3
= 9
Answer(s): 9
