PSLE At first, Risa had an equal number of silver and purple beads . She gave away
34 of her silver beads and some purple beads. In the end, she was left with
25 of her beads. What fraction of the purple beads was Risa left with?
|
Silver |
Purple |
Total |
Comparing silver beads and purple beads at first |
1x4x5 = 20 u |
1x4x5 = 20 u |
2x4x5 = 40 u |
Before |
4x5 = 20 u |
20 u |
5x8 = 40 u |
Change |
- 3x5 = - 15 u |
- 9 u |
- 2x8 = - 24 u |
After |
1x5 = 5 u |
11 u |
3x8 = 16 u |
The number of silver beads at first is repeated. Make the number of silver beads the first the same. LCM of 4 and 1 is 4.
The total number of beads at first is repeated. Make the total number of beads at first the same. LCM of 8 and 5 is 40.
Number of purple beads that Risa was left with
= 16 u - 5 u
= 11 u
Fraction of the purple beads that Risa was left with =
1120 Answer(s):
1120