Min and Kylie collected postcards. Min gave 60% of her postcards to Kylie and as a result, Kylie's postcards increased by 20%. If Min had 14 postcards left, find the number of postcards Kylie should give to Min in the end so that both had an equal number of postcards.
|
Min
|
Kylie |
Comparing the change in Kylie's postcards
|
Before
|
5x1 = 5 u |
|
5x3 = 15u |
Change
|
- 3x1 = - 3 u
|
+ 3x1 = + 3 u
|
+ 1x3 = + 3 u
|
After
|
2x1 = 2 u
|
|
6x3 = 18 u |
60% =
60100 =
3520% =
20100 =
15The increase in the number of postcards that Kylie had is repeated. Make the increase in the number of postcards that Kylie had the same. LCM of 3 and 1 = 3
2 u = 14
1 u = 14 ÷ 2 = 7
Number of postcards that Kylie had more than Min in the end
= 18 u - 2 u
= 16 u
Number of postcards that Kylie should give to Min so that both had an equal number of postcards in the end
= 16 u ÷ 2
= 8 u
= 8 x 7
= 56
Answer(s): 56