Adam has 130 stickers in 3 colours.
40% of the stickers are red.
The number of green stickers is
15 that of blue stickers.
- What percentage of the stickers is blue?
- How many green stickers are there?
Red |
Green |
Blue |
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 green and blue stickers is the combined repeated identity.
Make the number of green and blue stickers the same using the LCM of 3 and 6.
LCM of 3 and 6 = 6
Percentage of the stickers that is blue
=
510 x 100%
= 50%
(b)
Total number of stickers = 10 u
10 u = 130
1 u = 130 ÷ 10 = 13
Number of green stickers
= 1 u
= 1 x 13
= 13
Answer(s): (a) 50%; (b) 13