Hazel baked a total of 380 wafers and scones. After giving away 90% of the scones and 80% of the wafers, she was left with twice as many scones as wafers. Find the number of wafers Hazel gave away.
| |
Scones |
Wafers |
| Before |
10x2 =
20 u
|
5 u |
| Change |
- 9x2 =
18 u |
- 4 u |
| After |
1x2 =
2 u |
1 u |
Comparing scones and
wafers in the end |
2x1 =
2 u |
1x1 =
1 u |
90% =
90100 =
91080% =
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
= 20 u + 5 u
= 25 u
25 u = 380
1 u = 380 ÷ 25 = 4
Number of wafers that Hazel gave away
= 4 u
= 4 x 4
= 16
Answer(s): 16
