Adam has 250 stickers in 3 colours.
60% of the stickers are green.
The number of red stickers is
37 that of blue stickers.
- What percentage of the stickers is blue?
- How many red stickers are there?
Green |
Red |
Blue |
Total |
3 x 5 |
2 x 5 |
5 x 5 |
|
3 x 1 |
7 x 1 |
|
15 u |
3 u |
7 u |
25 u |
(a)
60% =
60100 =
35 The number of red and blue stickers is the combined repeated identity.
Make the number of red and blue stickers the same using the LCM of 2 and 10.
LCM of 2 and 10 = 10
Percentage of the stickers that is blue
=
725 x 100%
= 28%
(b)
Total number of stickers = 25 u
25 u = 250
1 u = 250 ÷ 25 = 10
Number of red stickers
= 3 u
= 3 x 10
= 30
Answer(s): (a) 28%; (b) 30