Adam has 180 stickers in 3 colours.
60% of the stickers are blue.
The number of green stickers is
35 that of red stickers.
- What percentage of the stickers is red?
- How many green stickers are there?
Blue |
Green |
Red |
Total |
3 x 4 |
2 x 4 |
5 x 4 |
|
3 x 1 |
5 x 1 |
|
12 u |
3 u |
5 u |
20 u |
(a)
60% =
60100 =
35 The number of green and red stickers is the combined repeated identity.
Make the number of green and red stickers the same using the LCM of 2 and 8.
LCM of 2 and 8 = 8
Percentage of the stickers that is red
=
520 x 100%
= 25%
(b)
Total number of stickers = 20 u
20 u = 180
1 u = 180 ÷ 20 = 9
Number of green stickers
= 3 u
= 3 x 9
= 27
Answer(s): (a) 25%; (b) 27