Adam has 360 stickers in 3 colours.
75% of the stickers are green.
The number of red stickers is
14 that of blue stickers.
- What percentage of the stickers is blue?
- How many red stickers are there?
Green |
Red |
Blue |
Total |
3 x 5 |
1 x 5 |
4 x 5 |
|
1 x 1 |
4 x 1 |
|
15 u |
1 u |
4 u |
20 u |
(a)
75% =
75100 =
34 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 1 and 5.
LCM of 1 and 5 = 5
Percentage of the stickers that is blue
=
420 x 100%
= 20%
(b)
Total number of stickers = 20 u
20 u = 360
1 u = 360 ÷ 20 = 18
Number of red stickers
= 1 u
= 1 x 18
= 18
Answer(s): (a) 20%; (b) 18