PSLE At first, Abi had an equal number of red and purple marbles . She gave away
25 of her red marbles and some purple marbles. In the end, she was left with
34 of her marbles. What fraction of the purple marbles was Abi left with?
|
Red |
Purple |
Total |
Comparing red marbles and purple marbles at first |
1x5x2 = 10 u |
1x5x2 = 10 u |
2x5x2 = 20 u |
Before |
5x2 = 10 u |
10 u |
4x5 = 20 u |
Change |
- 2x2 = - 4 u |
- 1 u |
- 3x5 = - 5 u |
After |
3x2 = 6 u |
9 u |
1x5 = 15 u |
The number of red marbles at first is repeated. Make the number of red 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 4 is 20.
Number of purple marbles that Abi was left with
= 15 u - 6 u
= 9 u
Fraction of the purple marbles that Abi was left with =
910 Answer(s):
910