PSLE At first, Jen had an equal number of orange and black beads . She gave away
23 of her orange beads and some black beads. In the end, she was left with
25 of her beads. What fraction of the black beads did Jen give away?
|
Orange |
Black |
Total |
Comparing orange beads and black beads at first |
1x3x5 = 15 u |
1x3x5 = 15 u |
2x3x5 = 30 u |
Before |
3x5 = 15 u |
15 u |
5x6 = 30 u |
Change |
- 2x5 = - 10 u |
- 8 u |
- 2x6 = - 18 u |
After |
1x5 = 5 u |
7 u |
3x6 = 12 u |
After
1x5 =
5 u7 u
3x6 =
12 uThe number of orange beads at first is repeated. Make the number of orange beads the first the same. LCM of 3 and 1 is 3.
The total number of beads at first is repeated. Make the total number of beads at first the same. LCM of 6 and 5 is 30.
Number of black beads that Jen was left with
= 12 u - 5 u
= 7 u
Number of black beads that Jen gave away
= 15 u - 7 u
= 8 u
Fraction of the black beads that Jen gave away =
815 Answer(s):
815