Joelle made 150 cupcakes and scones. After she gave 0.9 of the cupcakes and 0.6 of the scones to her girls, she was left with an equal number of cupcakes and scones. How many cupcakes had she left?
| |
Cupcakes |
Scones |
Before
|
10x2 =
20 u |
5x1 =
5 u |
Change
|
- 9x2 =
- 18 u |
- 3x1 =
- 3 u |
After
|
1x2 =
2 u |
2x1 =
2 u |
Comparing cupcakes and
scones in the end |
1x2 =
2 u |
1x2 =
2 u |
0.9 =
910 0.6 =
610 =
35 The number of cupcakes and scones is the same in the end. Make the number of cupcakes and scones in the end the same. LCM of 1 and 2 and 1 is 2.
Total number of cupcakes and scones at first
= 20 u + 5 u
= 25 u
25 u = 150
1 u = 150 ÷ 25 = 6
Number of cupcakes that Joelle had left
= 2 u
= 2 x 6
= 12
Answer(s): 12
