Adam has 280 stickers in 3 colours.
20% of the stickers are red.
The number of blue stickers is
17 that of green stickers.
- What percentage of the stickers is green?
- How many blue stickers are there?
Red |
Blue |
Green |
Total |
1 x 2 |
4 x 2 |
5 x 2 |
|
1 x 1 |
7 x 1 |
|
2 u |
1 u |
7 u |
10 u |
(a)
20% =
20100 =
15 The number of blue and green stickers is the combined repeated identity.
Make the number of blue and green stickers the same using the LCM of 4 and 8.
LCM of 4 and 8 = 8
Percentage of the stickers that is green
=
710 x 100%
= 70%
(b)
Total number of stickers = 10 u
10 u = 280
1 u = 280 ÷ 10 = 28
Number of blue stickers
= 1 u
= 1 x 28
= 28
Answer(s): (a) 70%; (b) 28