Adam has 350 stickers in 3 colours.
40% 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 |
2 x 5 |
3 x 5 |
5 x 5 |
|
2 x 3 |
3 x 3 |
|
10 u |
6 u |
9 u |
25 u |
(a)
40% =
40100 =
25 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 3 and 5.
LCM of 3 and 5 = 15
Percentage of the stickers that is red
=
925 x 100%
= 36%
(b)
Total number of stickers = 25 u
25 u = 350
1 u = 350 ÷ 25 = 14
Number of blue stickers
= 6 u
= 6 x 14
= 84
Answer(s): (a) 36%; (b) 84