Adam has 400 stickers in 3 colours.
40% of the stickers are red.
The number of blue stickers and green in the ratio of 1 : 5.
- What percentage of the stickers is green?
- How many blue stickers are there?
Red |
Blue |
Green |
Total |
2 x 2 |
3 x 2 |
5 x 2 |
|
1 x 1 |
5 x 1 |
|
4 u |
1 u |
5 u |
10 u |
(a)
40% =
40100 =
25 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 3 and 6.
LCM of 3 and 6 = 6
Percentage of the stickers that is green
=
510 x 100%
= 50%
(b)
Total number of stickers = 10 u
10 u = 400
1 u = 400 ÷ 10 = 40
Number of blue stickers
= 1 u
= 1 x 40
= 40
Answer(s): (a) 50%; (b) 40