Adam has 320 stickers in 3 colours.
25% 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 |
1 x 5 |
3 x 5 |
4 x 5 |
|
1 x 3 |
4 x 3 |
|
5 u |
3 u |
12 u |
20 u |
(a)
25% =
25100 =
14 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
=
1220 x 100%
= 60%
(b)
Total number of stickers = 20 u
20 u = 320
1 u = 320 ÷ 20 = 16
Number of red stickers
= 3 u
= 3 x 16
= 48
Answer(s): (a) 60%; (b) 48