Roshel baked a total of 231 scones and puffs. After giving away 80% of the puffs and 90% of the scones, she was left with four times as many puffs as scones. Find the number of scones Roshel gave away.
| |
Puffs |
Scones |
| Before |
5x4 =
20 u
|
10 u |
| Change |
- 4x4 =
16 u |
- 9 u |
| After |
1x4 =
4 u |
1 u |
Comparing puffs and
scones in the end |
4x1 =
4 u |
1x1 =
1 u |
80% =
80100 =
4590% =
90100 =
910The number of puffs in the end is the repeated identity. Make the number of puffs in the end the same. LCM of 1 and 4 is 4.
Total number of pastries at first
= 20 u + 10 u
= 30 u
30 u = 231
1 u = 231 ÷ 30 = 5
Number of scones that Roshel gave away
= 9 u
= 9 x 5
= 45
Answer(s): 45
