Esther baked a total of 453 shortbreads and scones. After giving away 75% of the scones and 80% of the shortbreads, she was left with twice as many scones as shortbreads. Find the number of shortbreads Esther gave away.
| |
Scones |
Shortbreads |
| Before |
4x2 =
8 u
|
5 u |
| Change |
- 3x2 =
6 u |
- 4 u |
| After |
1x2 =
2 u |
1 u |
Comparing scones and
shortbreads in the end |
2x1 =
2 u |
1x1 =
1 u |
75% =
75100 =
3480% =
80100 =
45The number of scones in the end is the repeated identity. Make the number of scones in the end the same. LCM of 1 and 2 is 2.
Total number of pastries at first
= 8 u + 5 u
= 13 u
13 u = 453
1 u = 453 ÷ 13 = 10
Number of shortbreads that Esther gave away
= 4 u
= 4 x 10
= 40
Answer(s): 40
