PSLE At first, Esther had an equal number of black and gold marbles . She gave away
45 of her black marbles and some gold marbles. In the end, she was left with
14 of her marbles. What fraction of the gold marbles was Esther left with?
|
Black |
Gold |
Total |
Comparing black marbles and gold marbles at first |
1x5x2 = 10 u |
1x5x2 = 10 u |
2x5x2 = 20 u |
Before |
5x2 = 10 u |
10 u |
4x5 = 20 u |
Change |
- 4x2 = - 8 u |
- 7 u |
- 1x5 = - 15 u |
After |
1x2 = 2 u |
3 u |
3x5 = 5 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 4 is 20.
Number of gold marbles that Esther was left with
= 5 u - 2 u
= 3 u
Fraction of the gold marbles that Esther was left with =
310 Answer(s):
310