Adam has 300 stickers in 3 colours.
40% of the stickers are blue.
The number of red stickers is
37 that of green stickers.
- What percentage of the stickers is green?
- How many red stickers are there?
Blue |
Red |
Green |
Total |
2 x 10 |
3 x 10 |
5 x 10 |
|
3 x 3 |
7 x 3 |
|
20 u |
9 u |
21 u |
50 u |
(a)
40% =
40100 =
25 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 3 and 10.
LCM of 3 and 10 = 30
Percentage of the stickers that is green
=
2150 x 100%
= 42%
(b)
Total number of stickers = 50 u
50 u = 300
1 u = 300 ÷ 50 = 6
Number of red stickers
= 9 u
= 9 x 6
= 54
Answer(s): (a) 42%; (b) 54