Julie baked a total of 372 croissants and wafers. After giving away 80% of the wafers and 90% of the croissants, she was left with twice as many wafers as croissants. Find the number of croissants Julie gave away.
| |
Wafers |
Croissants |
| Before |
5x2 =
10 u
|
10 u |
| Change |
- 4x2 =
8 u |
- 9 u |
| After |
1x2 =
2 u |
1 u |
Comparing wafers and
croissants in the end |
2x1 =
2 u |
1x1 =
1 u |
80% =
80100 =
4590% =
90100 =
910The number of wafers in the end is the repeated identity. Make the number of wafers in the end the same. LCM of 1 and 2 is 2.
Total number of pastries at first
= 10 u + 10 u
= 20 u
20 u = 372
1 u = 372 ÷ 20 = 4
Number of croissants that Julie gave away
= 9 u
= 9 x 4
= 36
Answer(s): 36
