PSLE At first, Irene had an equal number of green and pink stickers . She gave away
45 of her green stickers and some pink stickers. In the end, she was left with
25 of her stickers. What fraction of the pink stickers did Irene give away?
|
Green |
Pink |
Total |
Comparing green stickers and pink stickers at first |
1x5x1 = 5 u |
1x5x1 = 5 u |
2x5x1 = 10 u |
Before |
5x1 = 5 u |
5 u |
5x2 = 10 u |
Change |
- 4x1 = - 4 u |
- 2 u |
- 2x2 = - 6 u |
After |
1x1 = 1 u |
3 u |
3x2 = 4 u |
After
1x1 =
1 u3 u
3x2 =
4 uThe number of green stickers at first is repeated. Make the number of green stickers the first the same. LCM of 5 and 1 is 5.
The total number of stickers at first is repeated. Make the total number of stickers at first the same. LCM of 10 and 5 is 10.
Number of pink stickers that Irene was left with
= 4 u - 1 u
= 3 u
Number of pink stickers that Irene gave away
= 5 u - 3 u
= 2 u
Fraction of the pink stickers that Irene gave away =
25 Answer(s):
25