5 days ago, Lynn had a total of 100 gold and green stickers. 40% of her stickers were green stickers. Today, her father gave her some more stickers. As a result, her gold stickers increased by 25%. Now, 50% of her stickers are green stickers. How many green stickers did her father give her?
| |
Green stickers |
Gold stickers |
Total
stickers |
| Before |
2 u |
3 u |
100 |
| Change |
+ 1.75 u |
+ 0.75 u |
|
| After |
3.75 u |
3.75 u |
|
Comparing the
gold stickers and
green stickers in the end |
1 |
1 |
|
40% =
40100 =
25 Green stickers : Gold stickers = 2 : 3
Increase in the number of gold stickers
= 25% x 3 u
=
25100 x 3 u
= 0.75 u
50% =
50100 =
12 In the end
Green stickers : Gold stickers = 1 : 1
Number of stickers at first
= 3 u + 2 u
= 5 u
5 u = 100
1 u = 100 ÷ 5 = 20
Number of green stickers that Lynn received from her father
= 3.75 u - 2 u
= 1.75 u
= 1.75 x 20
= 35
Answer(s): 35
