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

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

Red	Blue	Green	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 red stickers = 3 u

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

20 u = 200

1 u = 200 ÷ 20 = 10

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

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

Total number of blue and green 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 green stickers
= 1 p
= 80

(b)
Number of blue stickers
= 1 p + 10
= 80 + 10
= 90

Number of red stickers
= 3 u
= 3 x 10
= 30

Number of more blue than red stickers
= 90 - 30
= 60

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