Adam has 200 green stickers, blue stickers and red stickers.
15% of the stickers are green.
There are 10 more blue stickers than red stickers.

1. How many red stickers are there?
2. How many less green stickers than blue stickers?

Green	Blue	Red	Total
3 u	17 u = 170		20 u = 200
	1 p + 10	1 p

(a)
15% = ¹⁵₁₀₀ = ³₂₀

Total number of stickers = 20 u
Number of green stickers = 3 u

Number of blue and red stickers
= 20 u - 3 u
= 17 u

20 u = 200

1 u = 200 ÷ 20 = 10

Number of blue stickers and red stickers
= 17 u
= 17 x 10
= 170

Number of red stickers = 1 p
Number of blue stickers = 1 p + 10

Total number of blue and red stickers
= 1 p + 1 p + 10
= 2 p + 10

2 p + 10 = 170
2 p = 170 - 10
2 p = 160

1 p = 160 ÷ 2 = 80

Number of red stickers
= 1 p
= 80

(b)
Number of green stickers
= 3 u
= 3 x 10
= 30

Number of blue stickers
= 1 p + 10
= 80 + 10
= 90

Number of less green stickers than blue stickers
= 90 - 30
= 60

Answer(s): (a) 80; (b) 60