Emily made 300 wafers and macarons. After she gave 0.1 of the wafers and 0.4 of the macarons to her children, she was left with an equal number of wafers and macarons. How many wafers had she left?
| |
Wafers |
Macarons |
Before
|
10x1 =
10 u |
5x3 =
15 u |
Change
|
- 1x1 =
- 1 u |
- 2x3 =
- 6 u |
After
|
9x1 =
9 u |
3x3 =
9 u |
Comparing wafers and
macarons in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.4 =
410 =
25 The number of wafers and macarons is the same in the end. Make the number of wafers and macarons in the end the same. LCM of 9 and 3 and 1 is 9.
Total number of wafers and macarons at first
= 10 u + 15 u
= 25 u
25 u = 300
1 u = 300 ÷ 25 = 12
Number of wafers that Emily had left
= 9 u
= 9 x 12
= 108
Answer(s): 108
