PSLE At first, Kathy had an equal number of red and orange stickers . She gave away
45 of her red stickers and some orange stickers. In the end, she was left with
25 of her stickers. What fraction of the orange stickers did Kathy give away?
|
Red |
Orange |
Total |
Comparing red stickers and orange 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 red stickers at first is repeated. Make the number of red 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 orange stickers that Kathy was left with
= 4 u - 1 u
= 3 u
Number of orange stickers that Kathy gave away
= 5 u - 3 u
= 2 u
Fraction of the orange stickers that Kathy gave away =
25 Answer(s):
25