Adam has 200 stickers in 3 colours.
20% of the stickers are red.
The number of blue stickers and green in the ratio of 1 : 4.
- What percentage of the stickers is green?
- How many blue stickers are there?
Red |
Blue |
Green |
Total |
1 x 5 |
4 x 5 |
5 x 5 |
|
1 x 4 |
4 x 4 |
|
5 u |
4 u |
16 u |
25 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 5.
LCM of 4 and 5 = 20
Percentage of the stickers that is green
=
1625 x 100%
= 64%
(b)
Total number of stickers = 25 u
25 u = 200
1 u = 200 ÷ 25 = 8
Number of blue stickers
= 4 u
= 4 x 8
= 32
Answer(s): (a) 64%; (b) 32