Joelle made 184 wafers and macarons. After she gave 0.1 of the wafers and 0.75 of the macarons to her friends, she was left with an equal number of wafers and macarons. How many macarons had she left?
| |
Wafers |
Macarons |
Before
|
10x1 =
10 u |
4x9 =
36 u |
Change
|
- 1x1 =
- 1 u |
- 3x9 =
- 27 u |
After
|
9x1 =
9 u |
1x9 =
9 u |
Comparing wafers and
macarons in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.75 =
75100 =
34 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 1 and 1 is 9.
Total number of wafers and macarons at first
= 10 u + 36 u
= 46 u
46 u = 184
1 u = 184 ÷ 46 = 4
Number of macarons that Joelle had left
= 9 u
= 9 x 4
= 36
Answer(s): 36
