Emma made 460 cupcakes and puffs. After she gave 0.1 of the cupcakes and 0.75 of the puffs to her boys, she was left with an equal number of cupcakes and puffs. How many puffs had she left?
| |
Cupcakes |
Puffs |
Before
|
10x1 =
10 u |
4x9 =
36 u |
Change
|
- 1x1 =
- 1 u |
- 3x9 =
- 27 u |
After
|
9x1 =
9 u |
1x9 =
9 u |
Comparing cupcakes and
puffs in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.75 =
75100 =
34 The number of cupcakes and puffs is the same in the end. Make the number of cupcakes and puffs in the end the same. LCM of 9 and 1 and 1 is 9.
Total number of cupcakes and puffs at first
= 10 u + 36 u
= 46 u
46 u = 460
1 u = 460 ÷ 46 = 10
Number of puffs that Emma had left
= 9 u
= 9 x 10
= 90
Answer(s): 90
