PSLE At first, Roshel had an equal number of yellow and purple marbles . She gave away
34 of her yellow marbles and some purple marbles. In the end, she was left with
25 of her marbles. What fraction of the purple marbles did Roshel give away?
|
Yellow |
Purple |
Total |
Comparing yellow marbles and purple marbles at first |
1x4x5 = 20 u |
1x4x5 = 20 u |
2x4x5 = 40 u |
Before |
4x5 = 20 u |
20 u |
5x8 = 40 u |
Change |
- 3x5 = - 15 u |
- 9 u |
- 2x8 = - 24 u |
After |
1x5 = 5 u |
11 u |
3x8 = 16 u |
After
1x5 =
5 u11 u
3x8 =
16 uThe number of yellow marbles at first is repeated. Make the number of yellow marbles the first the same. LCM of 4 and 1 is 4.
The total number of marbles at first is repeated. Make the total number of marbles at first the same. LCM of 8 and 5 is 40.
Number of purple marbles that Roshel was left with
= 16 u - 5 u
= 11 u
Number of purple marbles that Roshel gave away
= 20 u - 11 u
= 9 u
Fraction of the purple marbles that Roshel gave away =
920 Answer(s):
920