Sarah baked a total of 293 scones and biscuits. After giving away 80% of the biscuits and 75% of the scones, she was left with twice as many biscuits as scones. Find the number of scones Sarah gave away.
|
Biscuits |
Scones |
Before |
5x2 = 10 u
|
4 u |
Change |
- 4x2 = 8 u |
- 3 u |
After |
1x2 = 2 u |
1 u |
Comparing biscuits and scones in the end |
2x1 = 2 u |
1x1 = 1 u |
80% =
80100 =
4575% =
75100 =
34The number of biscuits in the end is the repeated identity. Make the number of biscuits in the end the same. LCM of 1 and 2 is 2.
Total number of pastries at first
= 10 u + 4 u
= 14 u
14 u = 293
1 u = 293 ÷ 14 = 7
Number of scones that Sarah gave away
= 3 u
= 3 x 7
= 21
Answer(s): 21