PSLE A box contained red beads and brown beads. 40% of the beads were brown. After some white beads were added to the box, 14% of the beads were brown. What percentage of the beads in the box were white?
|
Brown |
Red |
White |
Total |
Before |
2 u |
3 u |
|
5 u |
Change |
|
|
+ ? |
|
After |
14% |
21% |
|
100% |
40% =
40100 =
25 The number of brown beads remains unchanged.
2 u → 14%
1 u → 14% ÷ 2 = 7%
3 u → 3 x 7 = 21%
Percentage of the beads in the box that were white
= 100% - 14% - 21%
= 65%
Answer(s): 65%