Dana made 390 macarons and puffs. After she gave 0.1 of the macarons and 0.6 of the puffs to her children, she was left with an equal number of macarons and puffs. How many macarons had she left?
| |
Macarons |
Puffs |
Before
|
10x2 =
20 u |
5x9 =
45 u |
Change
|
- 1x2 =
- 2 u |
- 3x9 =
- 27 u |
After
|
9x2 =
18 u |
2x9 =
18 u |
Comparing macarons and
puffs in the end |
1x18 =
18 u |
1x18 =
18 u |
0.1 =
110 0.6 =
610 =
35 The number of macarons and puffs is the same in the end. Make the number of macarons and puffs in the end the same. LCM of 9 and 2 and 1 is 18.
Total number of macarons and puffs at first
= 20 u + 45 u
= 65 u
65 u = 390
1 u = 390 ÷ 65 = 6
Number of macarons that Dana had left
= 18 u
= 18 x 6
= 108
Answer(s): 108
