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