Adam has some blue stickers and green stickers.
If Adam gives away 48 blue stickers,
the blue stickers will be 20% as many as the green stickers.
If Adam gives away 90 green stickers,
the blue stickers will be 75% as many as the green stickers.

1. How many blue stickers are there? 
2. How many green stickers are there? 

	Scenario 1		Scenario 2
	Blue	Green	Blue	Green
Before	1 u + 48	5 u	3 p	4 p + 90
Change	- 48	No change	No change	- 90
After	1 u	5 u	3 p	4 p

(a)
20% = ²⁰₁₀₀ = ¹₅
75% = ⁷⁵₁₀₀ = ³₄

Scenario 1
Number of blue stickers at first = 1 u + 48
Number of green stickers at first = 5 u

Scenario 2
Number of blue stickers at first = 3 p
Number of green stickers at first = 4 p + 90

1 u + 48 = 3 p --- (1)
5 u = 4 p + 90 --- (2)

(1) _{x 5}
5 u + 240 = 15 p
5 u = 15 p - 240 --- (3)

(3) = (2)
15 p - 240 = 4 p + 90
15 p - 4 p = 240 + 90
11 p = 330

1 p = 330 ÷ 11 = 30

Number of blue stickers
= 3 p
= 3 x 30
= 90

(b)
Number of green stickers at first
= 4 p + 90
= 4 x 30 + 90
= 120 + 90
= 210

Answer(s): (a) 90; (b) 210