Adam has 200 stickers in 3 colours.
20% of the stickers are blue.
The number of red stickers and green in the ratio of 2 : 3.
- What percentage of the stickers is green?
- How many red stickers are there?
Blue |
Red |
Green |
Total |
1 x 5 |
4 x 5 |
5 x 5 |
|
2 x 4 |
3 x 4 |
|
5 u |
8 u |
12 u |
25 u |
(a)
20% =
20100 =
15 The number of red and green stickers is the combined repeated identity.
Make the number of red and green stickers the same using the LCM of 4 and 5.
LCM of 4 and 5 = 20
Percentage of the stickers that is green
=
1225 x 100%
= 48%
(b)
Total number of stickers = 25 u
25 u = 200
1 u = 200 ÷ 25 = 8
Number of red stickers
= 8 u
= 8 x 8
= 64
Answer(s): (a) 48%; (b) 64