PSLE At first, Wendy had an equal number of black and purple marbles . She gave away
25 of her black marbles and some purple marbles. In the end, she was left with
35 of her marbles. What fraction of the purple marbles was Wendy left with?
|
Black |
Purple |
Total |
Comparing black 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 |
- 2x1 = - 2 u |
- 2 u |
- 3x2 = - 4 u |
After |
3x1 = 3 u |
3 u |
2x2 = 6 u |
The number of black marbles at first is repeated. Make the number of black 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 Wendy was left with
= 6 u - 3 u
= 3 u
Fraction of the purple marbles that Wendy was left with =
35 Answer(s):
35