Lynn made 132 tarts and muffins. After she gave 0.7 of the tarts and 0.75 of the muffins to her students, she was left with an equal number of tarts and muffins. How many muffins had she left?
| |
Tarts |
Muffins |
Before
|
10x1 =
10 u |
4x3 =
12 u |
Change
|
- 7x1 =
- 7 u |
- 3x3 =
- 9 u |
After
|
3x1 =
3 u |
1x3 =
3 u |
Comparing tarts and
muffins in the end |
1x3 =
3 u |
1x3 =
3 u |
0.7 =
710 0.75 =
75100 =
34 The number of tarts and muffins is the same in the end. Make the number of tarts and muffins in the end the same. LCM of 3 and 1 and 1 is 3.
Total number of tarts and muffins at first
= 10 u + 12 u
= 22 u
22 u = 132
1 u = 132 ÷ 22 = 6
Number of muffins that Lynn had left
= 3 u
= 3 x 6
= 18
Answer(s): 18
