There are 25% more pink stamps than grey stamps in a bag. After Jeremy removed 40% of the pink stamps and increased the number of grey stamps by 35%, there are now 48 fewer pink stamps than grey stamps. Find the number of grey stamps at first.

	Pink	Grey
Before	5 u	4 u
Change	- 2 u	+ 1.4 u
After	3 u	5.4 u

Number of pink stamps in percentage
= 100% + 25%
= 125%

125% = ¹²⁵₁₀₀ = ⁵₄

Number of pink stamps that Jeremy removed
= 40% x 5 u
= ⁴⁰₁₀₀ x 5 u 
= 2 u

Number of grey stamps that Jeremy increased 
= 35% x 4 u
= ³⁵₁₀₀  x 4 u
= 1.4 u

Number of pink stamps in the end
= 5 u - 2 u
= 3 u

Number of grey stamps in the end
= 4 u + 1.4 u
= 5.4 u

Number of fewer pink stamps than grey stamps in the end
= 5.4 u - 3 u 
= 2.4 u 

2.4 u = 48

1 u = 48 ÷ 2.4 = 20

Number of grey stamps at first
= 4 u
= 4 x 20
= 80

Answer(s): 80