Adam has 250 stickers in 3 colours.
20% of the stickers are green.
The number of blue stickers is
23 that of red stickers.
- What percentage of the stickers is red?
- How many blue stickers are there?
Green |
Blue |
Red |
Total |
1 x 5 |
4 x 5 |
5 x 5 |
|
2 x 4 |
3 x 4 |
|
5 u |
8 u |
12 u |
25 u |
(a)
20% =
20100 =
15 The number of blue and red stickers is the combined repeated identity.
Make the number of blue and red stickers the same using the LCM of 4 and 5.
LCM of 4 and 5 = 20
Percentage of the stickers that is red
=
1225 x 100%
= 48%
(b)
Total number of stickers = 25 u
25 u = 250
1 u = 250 ÷ 25 = 10
Number of blue stickers
= 8 u
= 8 x 10
= 80
Answer(s): (a) 48%; (b) 80