PSLE At first, Betty had an equal number of black and silver stickers . She gave away
25 of her black stickers and some silver stickers. In the end, she was left with
34 of her stickers. What fraction of the silver stickers was Betty left with?
|
Black |
Silver |
Total |
Comparing black stickers and silver stickers 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 black stickers at first is repeated. Make the number of black stickers the first the same. LCM of 5 and 1 is 5.
The total number of stickers at first is repeated. Make the total number of stickers at first the same. LCM of 10 and 4 is 20.
Number of silver stickers that Betty was left with
= 15 u - 6 u
= 9 u
Fraction of the silver stickers that Betty was left with =
910 Answer(s):
910