Lynn baked a total of 496 tarts and cookies. After giving away 80% of the cookies and 75% of the tarts, she was left with thrice as many cookies as tarts. Find the number of tarts Lynn gave away.
| |
Cookies |
Tarts |
| Before |
5x3 =
15 u
|
4 u |
| Change |
- 4x3 =
12 u |
- 3 u |
| After |
1x3 =
3 u |
1 u |
Comparing cookies and
tarts in the end |
3x1 =
3 u |
1x1 =
1 u |
80% =
80100 =
4575% =
75100 =
34The number of cookies in the end is the repeated identity. Make the number of cookies in the end the same. LCM of 1 and 3 is 3.
Total number of pastries at first
= 15 u + 4 u
= 19 u
19 u = 496
1 u = 496 ÷ 19 = 6
Number of tarts that Lynn gave away
= 3 u
= 3 x 6
= 18
Answer(s): 18
