Hazel made 350 wafers and cupcakes. After she gave 0.9 of the wafers and 0.4 of the cupcakes to her pupils, she was left with an equal number of wafers and cupcakes. How many wafers had she left?
| |
Wafers |
Cupcakes |
Before
|
10x3 =
30 u |
5x1 =
5 u |
Change
|
- 9x3 =
- 27 u |
- 2x1 =
- 2 u |
After
|
1x3 =
3 u |
3x1 =
3 u |
Comparing wafers and
cupcakes in the end |
1x3 =
3 u |
1x3 =
3 u |
0.9 =
910 0.4 =
410 =
25 The number of wafers and cupcakes is the same in the end. Make the number of wafers and cupcakes in the end the same. LCM of 1 and 3 and 1 is 3.
Total number of wafers and cupcakes at first
= 30 u + 5 u
= 35 u
35 u = 350
1 u = 350 ÷ 35 = 10
Number of wafers that Hazel had left
= 3 u
= 3 x 10
= 30
Answer(s): 30
