Shannon made 210 biscuits and scones. After she gave 0.9 of the biscuits and 0.4 of the scones to her boys, she was left with an equal number of biscuits and scones. How many biscuits had she left?
| |
Biscuits |
Scones |
Before
|
10x3 =
30 u |
5x1 =
5 u |
Change
|
- 9x3 =
- 27 u |
- 2x1 =
- 2 u |
After
|
1x3 =
3 u |
3x1 =
3 u |
Comparing biscuits and
scones in the end |
1x3 =
3 u |
1x3 =
3 u |
0.9 =
910 0.4 =
410 =
25 The number of biscuits and scones is the same in the end. Make the number of biscuits and scones in the end the same. LCM of 1 and 3 and 1 is 3.
Total number of biscuits and scones at first
= 30 u + 5 u
= 35 u
35 u = 210
1 u = 210 ÷ 35 = 6
Number of biscuits that Shannon had left
= 3 u
= 3 x 6
= 18
Answer(s): 18
