Raeann baked a total of 277 croissants and biscuits. After giving away 75% of the biscuits and 90% of the croissants, she was left with thrice as many biscuits as croissants. Find the number of croissants Raeann gave away.
| |
Biscuits |
Croissants |
| Before |
4x3 =
12 u
|
10 u |
| Change |
- 3x3 =
9 u |
- 9 u |
| After |
1x3 =
3 u |
1 u |
Comparing biscuits and
croissants in the end |
3x1 =
3 u |
1x1 =
1 u |
75% =
75100 =
3490% =
90100 =
910The number of biscuits in the end is the repeated identity. Make the number of biscuits in the end the same. LCM of 1 and 3 is 3.
Total number of pastries at first
= 12 u + 10 u
= 22 u
22 u = 277
1 u = 277 ÷ 22 = 9
Number of croissants that Raeann gave away
= 9 u
= 9 x 9
= 81
Answer(s): 81
