Adam has 190 stickers in 3 colours.
40% of the stickers are blue.
The number of red stickers is
15 that of green stickers.
- What percentage of the stickers is green?
- How many red stickers are there?
Blue |
Red |
Green |
Total |
2 x 2 |
3 x 2 |
5 x 2 |
|
1 x 1 |
5 x 1 |
|
4 u |
1 u |
5 u |
10 u |
(a)
40% =
40100 =
25 The number of red and green stickers is the combined repeated identity.
Make the number of red and green stickers the same using the LCM of 3 and 6.
LCM of 3 and 6 = 6
Percentage of the stickers that is green
=
510 x 100%
= 50%
(b)
Total number of stickers = 10 u
10 u = 190
1 u = 190 ÷ 10 = 19
Number of red stickers
= 1 u
= 1 x 19
= 19
Answer(s): (a) 50%; (b) 19