Gwen made 456 cookies and scones. After she gave 0.3 of the cookies and 0.75 of the scones to her pupils, she was left with an equal number of cookies and scones. How many scones had she left?
| |
Cookies |
Scones |
Before
|
10x1 =
10 u |
4x7 =
28 u |
Change
|
- 3x1 =
- 3 u |
- 3x7 =
- 21 u |
After
|
7x1 =
7 u |
1x7 =
7 u |
Comparing cookies and
scones in the end |
1x7 =
7 u |
1x7 =
7 u |
0.3 =
310 0.75 =
75100 =
34 The number of cookies and scones is the same in the end. Make the number of cookies and scones in the end the same. LCM of 7 and 1 and 1 is 7.
Total number of cookies and scones at first
= 10 u + 28 u
= 38 u
38 u = 456
1 u = 456 ÷ 38 = 12
Number of scones that Gwen had left
= 7 u
= 7 x 12
= 84
Answer(s): 84
