Gem made 264 wafers and biscuits. After she gave 0.7 of the wafers and 0.75 of the biscuits to her girls, she was left with an equal number of wafers and biscuits. How many biscuits had she left?
| |
Wafers |
Biscuits |
Before
|
10x1 =
10 u |
4x3 =
12 u |
Change
|
- 7x1 =
- 7 u |
- 3x3 =
- 9 u |
After
|
3x1 =
3 u |
1x3 =
3 u |
Comparing wafers and
biscuits in the end |
1x3 =
3 u |
1x3 =
3 u |
0.7 =
710 0.75 =
75100 =
34 The number of wafers and biscuits is the same in the end. Make the number of wafers and biscuits in the end the same. LCM of 3 and 1 and 1 is 3.
Total number of wafers and biscuits at first
= 10 u + 12 u
= 22 u
22 u = 264
1 u = 264 ÷ 22 = 12
Number of biscuits that Gem had left
= 3 u
= 3 x 12
= 36
Answer(s): 36
