PSLE At first, Cindy had an equal number of black and gold beads . She gave away
45 of her black beads and some gold beads. In the end, she was left with
14 of her beads. What fraction of the gold beads was Cindy left with?
|
Black |
Gold |
Total |
Comparing black beads and gold 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 |
The number of black beads at first is repeated. Make the number of black 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 gold beads that Cindy was left with
= 5 u - 2 u
= 3 u
Fraction of the gold beads that Cindy was left with =
310 Answer(s):
310