PSLE At first, Hilda had an equal number of orange and purple marbles . She gave away
35 of her orange marbles and some purple marbles. In the end, she was left with
25 of her marbles. What fraction of the purple marbles did Hilda give away?
|
Orange |
Purple |
Total |
Comparing orange 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 |
- 3x1 = - 3 u |
- 3 u |
- 2x2 = - 6 u |
After |
2x1 = 2 u |
2 u |
3x2 = 4 u |
After
2x1 =
2 u2 u
3x2 =
4 uThe number of orange marbles at first is repeated. Make the number of orange 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 Hilda was left with
= 4 u - 2 u
= 2 u
Number of purple marbles that Hilda gave away
= 5 u - 2 u
= 3 u
Fraction of the purple marbles that Hilda gave away =
35 Answer(s):
35