PSLE A box contained grey beads and brown beads. 60% of the beads were brown. After some blue beads were added to the box, 27% of the beads were brown. What percentage of the beads in the box were blue?
|
Brown |
Grey |
Blue |
Total |
Before |
3 u |
2 u |
|
5 u |
Change |
|
|
+ ? |
|
After |
27% |
18% |
|
100% |
60% =
60100 =
35 The number of brown beads remains unchanged.
3 u → 27%
1 u → 27% ÷ 3 = 9%
2 u → 2 x 9 = 18%
Percentage of the beads in the box that were blue
= 100% - 27% - 18%
= 55%
Answer(s): 55%