Xuan and Nicole collected stickers. Nicole gave 75% of her stickers to Xuan. As a result, Xuan's stickers increased by 25%. If Xuan had 30 stickers left, find the total number of stickers the two girls had at first.
| |
Comparing the change
in Nicole's stickers |
Nicole |
Xuan |
| Before |
4x1 =
4 u |
|
4x3 =
12 u |
| Change |
- 3x1 =
- 3 u |
- 1x3 =
- 3 u |
+ 1x3 =
+ 3 u |
| After |
1x1 =
1 u |
|
5x3 =
15 u |
75% =
75100 =
34 25% =
25100 =
14 The number of stickers that Xuan gave to Nicole is repeated. Make the number of stickers that Xuan gave to Nicole the same. LCM of 1 and 3 is 3.
Number of stickers that Xuan had in the end = 15 u
15 u = 30
1 u = 30 ÷ 15 = 2
Number of stickers that Nicole and Xuan had at first
= 4 u + 12 u
= 16 u
= 16 x 2
= 32
Answer(s): 32
