Kathy made 605 scones and wafers. After she gave 0.1 of the scones and 0.8 of the wafers to her girls, she was left with an equal number of scones and wafers. How many scones had she left?
| |
Scones |
Wafers |
Before
|
10x1 =
10 u |
5x9 =
45 u |
Change
|
- 1x1 =
- 1 u |
- 4x9 =
- 36 u |
After
|
9x1 =
9 u |
1x9 =
9 u |
Comparing scones and
wafers in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.8 =
810 =
45 The number of scones and wafers is the same in the end. Make the number of scones and wafers in the end the same. LCM of 9 and 1 and 1 is 9.
Total number of scones and wafers at first
= 10 u + 45 u
= 55 u
55 u = 605
1 u = 605 ÷ 55 = 11
Number of scones that Kathy had left
= 9 u
= 9 x 11
= 99
Answer(s): 99
