Adam has 300 stickers in 3 colours.
40% of the stickers are green.
The number of red stickers is
14 that of blue stickers.
- What percentage of the stickers is blue?
- How many red stickers are there?
Green |
Red |
Blue |
Total |
2 x 5 |
3 x 5 |
5 x 5 |
|
1 x 3 |
4 x 3 |
|
10 u |
3 u |
12 u |
25 u |
(a)
40% =
40100 =
25 The number of red and blue stickers is the combined repeated identity.
Make the number of red and blue stickers the same using the LCM of 3 and 5.
LCM of 3 and 5 = 15
Percentage of the stickers that is blue
=
1225 x 100%
= 48%
(b)
Total number of stickers = 25 u
25 u = 300
1 u = 300 ÷ 25 = 12
Number of red stickers
= 3 u
= 3 x 12
= 36
Answer(s): (a) 48%; (b) 36