Wendy made 138 croissants and macarons. After she gave 0.1 of the croissants and 0.75 of the macarons to her girls, she was left with an equal number of croissants and macarons. How many macarons had she left?
| |
Croissants |
Macarons |
Before
|
10x1 =
10 u |
4x9 =
36 u |
Change
|
- 1x1 =
- 1 u |
- 3x9 =
- 27 u |
After
|
9x1 =
9 u |
1x9 =
9 u |
Comparing croissants and
macarons in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.75 =
75100 =
34 The number of croissants and macarons is the same in the end. Make the number of croissants and macarons in the end the same. LCM of 9 and 1 and 1 is 9.
Total number of croissants and macarons at first
= 10 u + 36 u
= 46 u
46 u = 138
1 u = 138 ÷ 46 = 3
Number of macarons that Wendy had left
= 9 u
= 9 x 3
= 27
Answer(s): 27
