Wendy made 414 scones and tarts. After she gave 0.1 of the scones and 0.75 of the tarts to her boys, she was left with an equal number of scones and tarts. How many tarts had she left?
| |
Scones |
Tarts |
Before
|
10x1 =
10 u |
4x9 =
36 u |
Change
|
- 1x1 =
- 1 u |
- 3x9 =
- 27 u |
After
|
9x1 =
9 u |
1x9 =
9 u |
Comparing scones and
tarts in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.75 =
75100 =
34 The number of scones and tarts is the same in the end. Make the number of scones and tarts in the end the same. LCM of 9 and 1 and 1 is 9.
Total number of scones and tarts at first
= 10 u + 36 u
= 46 u
46 u = 414
1 u = 414 ÷ 46 = 9
Number of tarts that Wendy had left
= 9 u
= 9 x 9
= 81
Answer(s): 81
