Adam has 390 red stickers, green stickers and blue stickers.
60% of the stickers are green.
25% 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 |
2 u |
|
25% |
75% |
|
2 u x 25% = 0.5 u
|
2 u x 75% = 1.5 u
|
60% =
60100 =
35 Total number of stickers = 5 u
Number of green stickers = 3 u
Number of red and blue stickers
= 5 u - 3 u
= 2 u
5 u = 390
1 u = 390 ÷ 5 = 78
(a)
Percent of remaining stickers that are blue
= 100% - 25%
= 75%
Number of blue stickers
= 75% x 2 u
= 0.75 x 2 u
= 1.5 u
= 1.5 x 78
= 117
(b)
Number of red stickers
= 25% x 2 u
= 0.25 x 2 u
= 0.5 u
Number of green stickers = 3 u
Number of less red stickers than green stickers
= 3 u - 0.5 u
= 2.5 u
= 2.5 x 78
= 195
Answer(s): (a) 117; (b) 195