PSLE At first, Jean had an equal number of silver and pink beads . She gave away
45 of her silver beads and some pink beads. In the end, she was left with
14 of her beads. What fraction of the pink beads did Jean give away?
|
Silver |
Pink |
Total |
Comparing silver beads and pink beads at first |
1x5x2 = 10 u |
1x5x2 = 10 u |
2x5x2 = 20 u |
Before |
5x2 = 10 u |
10 u |
4x5 = 20 u |
Change |
- 4x2 = - 8 u |
- 7 u |
- 1x5 = - 15 u |
After |
1x2 = 2 u |
3 u |
3x5 = 5 u |
After
1x2 =
2 u3 u
3x5 =
5 uThe number of silver beads at first is repeated. Make the number of silver beads the first the same. LCM of 5 and 1 is 5.
The total number of beads at first is repeated. Make the total number of beads at first the same. LCM of 10 and 4 is 20.
Number of pink beads that Jean was left with
= 5 u - 2 u
= 3 u
Number of pink beads that Jean gave away
= 10 u - 3 u
= 7 u
Fraction of the pink beads that Jean gave away =
710 Answer(s):
710