Min made 660 croissants and biscuits. After she gave 0.1 of the croissants and 0.8 of the biscuits to her boys, she was left with an equal number of croissants and biscuits. How many croissants had she left?
| |
Croissants |
Biscuits |
Before
|
10x1 =
10 u |
5x9 =
45 u |
Change
|
- 1x1 =
- 1 u |
- 4x9 =
- 36 u |
After
|
9x1 =
9 u |
1x9 =
9 u |
Comparing croissants and
biscuits in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.8 =
810 =
45 The number of croissants and biscuits is the same in the end. Make the number of croissants and biscuits in the end the same. LCM of 9 and 1 and 1 is 9.
Total number of croissants and biscuits at first
= 10 u + 45 u
= 55 u
55 u = 660
1 u = 660 ÷ 55 = 12
Number of croissants that Min had left
= 9 u
= 9 x 12
= 108
Answer(s): 108
