PSLE At first, Jane had an equal number of black and yellow beads . She gave away
45 of her black beads and some yellow beads. In the end, she was left with
25 of her beads. What fraction of the yellow beads was Jane left with?
|
Black |
Yellow |
Total |
Comparing black beads and yellow beads 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 |
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 5 is 10.
Number of yellow beads that Jane was left with
= 4 u - 1 u
= 3 u
Fraction of the yellow beads that Jane was left with =
35 Answer(s):
35