Tiffany baked a total of 499 shortbreads and muffins. After giving away 75% of the muffins and 90% of the shortbreads, she was left with four times as many muffins as shortbreads. Find the number of shortbreads Tiffany gave away.
| |
Muffins |
Shortbreads |
| Before |
4x4 =
16 u
|
10 u |
| Change |
- 3x4 =
12 u |
- 9 u |
| After |
1x4 =
4 u |
1 u |
Comparing muffins and
shortbreads in the end |
4x1 =
4 u |
1x1 =
1 u |
75% =
75100 =
3490% =
90100 =
910The number of muffins in the end is the repeated identity. Make the number of muffins in the end the same. LCM of 1 and 4 is 4.
Total number of pastries at first
= 16 u + 10 u
= 26 u
26 u = 499
1 u = 499 ÷ 26 = 3
Number of shortbreads that Tiffany gave away
= 9 u
= 9 x 3
= 27
Answer(s): 27
