Adam has some red stickers and blue stickers.
If Adam gives away 25 red stickers,
the red stickers will be 25% as many as the blue stickers.
If Adam gives away 68 blue stickers,
the red stickers will be 75% as many as the blue stickers.

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

	Scenario 1		Scenario 2
	Red	Blue	Red	Blue
Before	1 u + 25	4 u	3 p	4 p + 68
Change	- 25	No change	No change	- 68
After	1 u	4 u	3 p	4 p

(a)
25% = ²⁵₁₀₀ = ¹₄
75% = ⁷⁵₁₀₀ = ³₄

Scenario 1
Number of red stickers at first = 1 u + 25
Number of blue stickers at first = 4 u

Scenario 2
Number of red stickers at first = 3 p
Number of blue stickers at first = 4 p + 68

1 u + 25 = 3 p --- (1)
4 u = 4 p + 68 --- (2)

(1) _{x 4}
4 u + 100 = 12 p
4 u = 12 p - 100 --- (3)

(3) = (2)
12 p - 100 = 4 p + 68
12 p - 4 p = 100 + 68
8 p = 168

1 p = 168 ÷ 8 = 21

Number of red stickers
= 3 p
= 3 x 21
= 63

(b)
Number of blue stickers at first
= 4 p + 68
= 4 x 21 + 68
= 84 + 68
= 152

Answer(s): (a) 63; (b) 152