Adam has 130 stickers in 3 colours.
60% of the stickers are red.
The number of blue stickers and green in the ratio of 1 : 3.
- What percentage of the stickers is green?
- How many blue stickers are there?
Red |
Blue |
Green |
Total |
3 x 2 |
2 x 2 |
5 x 2 |
|
1 x 1 |
3 x 1 |
|
6 u |
1 u |
3 u |
10 u |
(a)
60% =
60100 =
35 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 2 and 4.
LCM of 2 and 4 = 4
Percentage of the stickers that is green
=
310 x 100%
= 30%
(b)
Total number of stickers = 10 u
10 u = 130
1 u = 130 ÷ 10 = 13
Number of blue stickers
= 1 u
= 1 x 13
= 13
Answer(s): (a) 30%; (b) 13