PSLE At first, Kathy had an equal number of pink and purple marbles . She gave away
45 of her pink marbles and some purple marbles. In the end, she was left with
25 of her marbles. What fraction of the purple marbles was Kathy left with?
|
Pink |
Purple |
Total |
Comparing pink marbles and purple marbles 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 pink marbles at first is repeated. Make the number of pink marbles the first the same. LCM of 5 and 1 is 5.
The total number of marbles at first is repeated. Make the total number of marbles at first the same. LCM of 10 and 5 is 10.
Number of purple marbles that Kathy was left with
= 4 u - 1 u
= 3 u
Fraction of the purple marbles that Kathy was left with =
35 Answer(s):
35