Opal made 385 muffins and tarts. After she gave 0.9 of the muffins and 0.4 of the tarts to her students, she was left with an equal number of muffins and tarts. How many muffins had she left?
| |
Muffins |
Tarts |
Before
|
10x3 =
30 u |
5x1 =
5 u |
Change
|
- 9x3 =
- 27 u |
- 2x1 =
- 2 u |
After
|
1x3 =
3 u |
3x1 =
3 u |
Comparing muffins and
tarts in the end |
1x3 =
3 u |
1x3 =
3 u |
0.9 =
910 0.4 =
410 =
25 The number of muffins and tarts is the same in the end. Make the number of muffins and tarts in the end the same. LCM of 1 and 3 and 1 is 3.
Total number of muffins and tarts at first
= 30 u + 5 u
= 35 u
35 u = 385
1 u = 385 ÷ 35 = 11
Number of muffins that Opal had left
= 3 u
= 3 x 11
= 33
Answer(s): 33
