PSLE A box contained red beads and green beads. 40% of the beads were green. After some silver beads were added to the box, 6% of the beads were green. What percentage of the beads in the box were silver?
|
Green |
Red |
Silver |
Total |
Before |
2 u |
3 u |
|
5 u |
Change |
|
|
+ ? |
|
After |
6% |
9% |
|
100% |
40% =
40100 =
25 The number of green beads remains unchanged.
2 u → 6%
1 u → 6% ÷ 2 = 3%
3 u → 3 x 3 = 9%
Percentage of the beads in the box that were silver
= 100% - 6% - 9%
= 85%
Answer(s): 85%