PSLE At first, Opal had an equal number of silver and purple stickers . She gave away
25 of her silver stickers and some purple stickers. In the end, she was left with
35 of her stickers. What fraction of the purple stickers did Opal give away?
|
Silver |
Purple |
Total |
Comparing silver stickers and purple stickers at first |
1x5x1 = 5 u |
1x5x1 = 5 u |
2x5x1 = 10 u |
Before |
5x1 = 5 u |
5 u |
5x2 = 10 u |
Change |
- 2x1 = - 2 u |
- 2 u |
- 3x2 = - 4 u |
After |
3x1 = 3 u |
3 u |
2x2 = 6 u |
After
3x1 =
3 u3 u
2x2 =
6 uThe number of silver stickers at first is repeated. Make the number of silver 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 purple stickers that Opal was left with
= 6 u - 3 u
= 3 u
Number of purple stickers that Opal gave away
= 5 u - 3 u
= 2 u
Fraction of the purple stickers that Opal gave away =
25 Answer(s):
25