PSLE At first, Usha had an equal number of orange and purple marbles . She gave away
25 of her orange marbles and some purple marbles. In the end, she was left with
34 of her marbles. What fraction of the purple marbles was Usha left with?
|
Orange |
Purple |
Total |
Comparing orange 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 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 4 is 20.
Number of purple marbles that Usha was left with
= 15 u - 6 u
= 9 u
Fraction of the purple marbles that Usha was left with =
910 Answer(s):
910