Olivia baked a total of 369 wafers and tarts. After giving away 90% of the tarts and 75% of the wafers, she was left with five times as many tarts as wafers. Find the number of wafers Olivia gave away.
| |
Tarts |
Wafers |
| Before |
10x5 =
50 u
|
4 u |
| Change |
- 9x5 =
45 u |
- 3 u |
| After |
1x5 =
5 u |
1 u |
Comparing tarts and
wafers in the end |
5x1 =
5 u |
1x1 =
1 u |
90% =
90100 =
91075% =
75100 =
34The number of tarts in the end is the repeated identity. Make the number of tarts in the end the same. LCM of 1 and 5 is 5.
Total number of pastries at first
= 50 u + 4 u
= 54 u
54 u = 369
1 u = 369 ÷ 54 = 8
Number of wafers that Olivia gave away
= 3 u
= 3 x 8
= 24
Answer(s): 24
