Wendy made 132 wafers and shortbreads. After she gave 0.7 of the wafers and 0.75 of the shortbreads to her boys, she was left with an equal number of wafers and shortbreads. How many shortbreads had she left?
| |
Wafers |
Shortbreads |
Before
|
10x1 =
10 u |
4x3 =
12 u |
Change
|
- 7x1 =
- 7 u |
- 3x3 =
- 9 u |
After
|
3x1 =
3 u |
1x3 =
3 u |
Comparing wafers and
shortbreads in the end |
1x3 =
3 u |
1x3 =
3 u |
0.7 =
710 0.75 =
75100 =
34 The number of wafers and shortbreads is the same in the end. Make the number of wafers and shortbreads in the end the same. LCM of 3 and 1 and 1 is 3.
Total number of wafers and shortbreads at first
= 10 u + 12 u
= 22 u
22 u = 132
1 u = 132 ÷ 22 = 6
Number of shortbreads that Wendy had left
= 3 u
= 3 x 6
= 18
Answer(s): 18
