Adam has 280 stickers in 3 colours.
25% of the stickers are red.
The number of green stickers is
14 that of blue stickers.
- What percentage of the stickers is blue?
- How many green stickers are there?
Red |
Green |
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 green and blue stickers is the combined repeated identity.
Make the number of green 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 = 280
1 u = 280 ÷ 20 = 14
Number of green stickers
= 3 u
= 3 x 14
= 42
Answer(s): (a) 60%; (b) 42