Adam has 300 stickers in 3 colours.
20% of the stickers are red.
The number of blue stickers is
35 that of green stickers.
- What percentage of the stickers is green?
- How many blue stickers are there?
Red |
Blue |
Green |
Total |
1 x 2 |
4 x 2 |
5 x 2 |
|
3 x 1 |
5 x 1 |
|
2 u |
3 u |
5 u |
10 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 8.
LCM of 4 and 8 = 8
Percentage of the stickers that is green
=
510 x 100%
= 50%
(b)
Total number of stickers = 10 u
10 u = 300
1 u = 300 ÷ 10 = 30
Number of blue stickers
= 3 u
= 3 x 30
= 90
Answer(s): (a) 50%; (b) 90