Adam has 170 stickers in 3 colours.
20% of the stickers are blue.
The number of green stickers is
17 that of red stickers.
- What percentage of the stickers is red?
- How many green stickers are there?
Blue |
Green |
Red |
Total |
1 x 2 |
4 x 2 |
5 x 2 |
|
1 x 1 |
7 x 1 |
|
2 u |
1 u |
7 u |
10 u |
(a)
20% =
20100 =
15 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 4 and 8.
LCM of 4 and 8 = 8
Percentage of the stickers that is red
=
710 x 100%
= 70%
(b)
Total number of stickers = 10 u
10 u = 170
1 u = 170 ÷ 10 = 17
Number of green stickers
= 1 u
= 1 x 17
= 17
Answer(s): (a) 70%; (b) 17