Lucy made 44 croissants and cookies. After she gave 0.7 of the croissants and 0.75 of the cookies to her pupils, she was left with an equal number of croissants and cookies. How many cookies had she left?
| |
Croissants |
Cookies |
Before
|
10x1 =
10 u |
4x3 =
12 u |
Change
|
- 7x1 =
- 7 u |
- 3x3 =
- 9 u |
After
|
3x1 =
3 u |
1x3 =
3 u |
Comparing croissants and
cookies in the end |
1x3 =
3 u |
1x3 =
3 u |
0.7 =
710 0.75 =
75100 =
34 The number of croissants and cookies is the same in the end. Make the number of croissants and cookies in the end the same. LCM of 3 and 1 and 1 is 3.
Total number of croissants and cookies at first
= 10 u + 12 u
= 22 u
22 u = 44
1 u = 44 ÷ 22 = 2
Number of cookies that Lucy had left
= 3 u
= 3 x 2
= 6
Answer(s): 6
