Adam has 220 red stickers, green stickers and blue stickers.
75% of the stickers are green.
60% of the remaining stickers are red.
The rest are blue stickers.
- How many blue stickers are there?
- How many less red stickers than green stickers?
Green |
Red |
Blue |
3 u |
1 u |
|
60% |
40% |
|
1 u x 60% = 0.6 u
|
1 u x 40% = 0.4 u
|
75% =
75100 =
34 Total number of stickers = 4 u
Number of green stickers = 3 u
Number of red and blue stickers
= 4 u - 3 u
= 1 u
4 u = 220
1 u = 220 ÷ 4 = 55
(a)
Percent of remaining stickers that are blue
= 100% - 60%
= 40%
Number of blue stickers
= 40% x 1 u
= 0.4 x 1 u
= 0.4 u
= 0.4 x 55
= 22
(b)
Number of red stickers
= 60% x 1 u
= 0.6 x 1 u
= 0.6 u
Number of green stickers = 3 u
Number of less red stickers than green stickers
= 3 u - 0.6 u
= 2.4 u
= 2.4 x 55
= 132
Answer(s): (a) 22; (b) 132