Gillian baked a total of 215 croissants and puffs. After giving away 80% of the puffs and 90% of the croissants, she was left with thrice as many puffs as croissants. Find the number of croissants Gillian gave away.
| |
Puffs |
Croissants |
| Before |
5x3 =
15 u
|
10 u |
| Change |
- 4x3 =
12 u |
- 9 u |
| After |
1x3 =
3 u |
1 u |
Comparing puffs and
croissants in the end |
3x1 =
3 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 3 is 3.
Total number of pastries at first
= 15 u + 10 u
= 25 u
25 u = 215
1 u = 215 ÷ 25 = 10
Number of croissants that Gillian gave away
= 9 u
= 9 x 10
= 90
Answer(s): 90
