Victoria made 140 muffins and cookies. After she gave 0.7 of the muffins and 0.6 of the cookies to her pupils, she was left with an equal number of muffins and cookies. How many muffins had she left?
| |
Muffins |
Cookies |
Before
|
10x2 =
20 u |
5x3 =
15 u |
Change
|
- 7x2 =
- 14 u |
- 3x3 =
- 9 u |
After
|
3x2 =
6 u |
2x3 =
6 u |
Comparing muffins and
cookies in the end |
1x6 =
6 u |
1x6 =
6 u |
0.7 =
710 0.6 =
610 =
35 The number of muffins and cookies is the same in the end. Make the number of muffins and cookies in the end the same. LCM of 3 and 2 and 1 is 6.
Total number of muffins and cookies at first
= 20 u + 15 u
= 35 u
35 u = 140
1 u = 140 ÷ 35 = 4
Number of muffins that Victoria had left
= 6 u
= 6 x 4
= 24
Answer(s): 24
