Yen made 242 macarons and tarts. After she gave 0.7 of the macarons and 0.75 of the tarts to her students, she was left with an equal number of macarons and tarts. How many tarts had she left?
| |
Macarons |
Tarts |
Before
|
10x1 =
10 u |
4x3 =
12 u |
Change
|
- 7x1 =
- 7 u |
- 3x3 =
- 9 u |
After
|
3x1 =
3 u |
1x3 =
3 u |
Comparing macarons and
tarts in the end |
1x3 =
3 u |
1x3 =
3 u |
0.7 =
710 0.75 =
75100 =
34 The number of macarons and tarts is the same in the end. Make the number of macarons and tarts in the end the same. LCM of 3 and 1 and 1 is 3.
Total number of macarons and tarts at first
= 10 u + 12 u
= 22 u
22 u = 242
1 u = 242 ÷ 22 = 11
Number of tarts that Yen had left
= 3 u
= 3 x 11
= 33
Answer(s): 33
