Zara and Xuan collected stamps. Zara gave 60% of her stamps to Xuan and as a result, Xuan's stamps increased by 20%. If Zara had 12 stamps left, find the number of stamps Xuan should give to Zara in the end so that both had an equal number of stamps.
| |
Zara
|
Xuan |
Comparing the change
in Xuan's stamps
|
|
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 stamps that Xuan had is repeated. Make the increase in the number of stamps that Xuan had the same. LCM of 3 and 1 = 3
2 u = 12
1 u = 12 ÷ 2 = 6
Number of stamps that Xuan had more than Zara in the end
= 18 u - 2 u
= 16 u
Number of stamps that Xuan should give to Zara so that both had an equal number of stamps in the end
= 16 u ÷ 2
= 8 u
= 8 x 6
= 48
Answer(s): 48
