Rachel made 276 muffins and biscuits. After she gave 0.1 of the muffins and 0.75 of the biscuits to her pupils, she was left with an equal number of muffins and biscuits. How many biscuits had she left?
| |
Muffins |
Biscuits |
Before
|
10x1 =
10 u |
4x9 =
36 u |
Change
|
- 1x1 =
- 1 u |
- 3x9 =
- 27 u |
After
|
9x1 =
9 u |
1x9 =
9 u |
Comparing muffins and
biscuits in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.75 =
75100 =
34 The number of muffins and biscuits is the same in the end. Make the number of muffins and biscuits in the end the same. LCM of 9 and 1 and 1 is 9.
Total number of muffins and biscuits at first
= 10 u + 36 u
= 46 u
46 u = 276
1 u = 276 ÷ 46 = 6
Number of biscuits that Rachel had left
= 9 u
= 9 x 6
= 54
Answer(s): 54
