Adam has 250 stickers in 3 colours.
30% of the stickers are red.
The number of blue stickers is
14 that of green stickers.
- What percentage of the stickers is green?
- How many blue stickers are there?
Red |
Blue |
Green |
Total |
3 x 5 |
7 x 5 |
10 x 5 |
|
1 x 7 |
4 x 7 |
|
15 u |
7 u |
28 u |
50 u |
(a)
30% =
30100 =
310 The number of blue and green stickers is the combined repeated identity.
Make the number of blue and green stickers the same using the LCM of 7 and 5.
LCM of 7 and 5 = 35
Percentage of the stickers that is green
=
2850 x 100%
= 56%
(b)
Total number of stickers = 50 u
50 u = 250
1 u = 250 ÷ 50 = 5
Number of blue stickers
= 7 u
= 7 x 5
= 35
Answer(s): (a) 56%; (b) 35