Tiffany made 780 puffs and muffins. After she gave 0.1 of the puffs and 0.6 of the muffins to her boys, she was left with an equal number of puffs and muffins. How many puffs had she left?
| |
Puffs |
Muffins |
Before
|
10x2 =
20 u |
5x9 =
45 u |
Change
|
- 1x2 =
- 2 u |
- 3x9 =
- 27 u |
After
|
9x2 =
18 u |
2x9 =
18 u |
Comparing puffs and
muffins in the end |
1x18 =
18 u |
1x18 =
18 u |
0.1 =
110 0.6 =
610 =
35 The number of puffs and muffins is the same in the end. Make the number of puffs and muffins in the end the same. LCM of 9 and 2 and 1 is 18.
Total number of puffs and muffins at first
= 20 u + 45 u
= 65 u
65 u = 780
1 u = 780 ÷ 65 = 12
Number of puffs that Tiffany had left
= 18 u
= 18 x 12
= 216
Answer(s): 216
