There are 25% more silver coins than green coins in a bag. After Tommy removed 40% of the silver coins and increased the number of green coins by 30%, there are now 132 fewer silver coins than green coins. Find the number of green coins at first.

	Silver	Green
Before	5 u	4 u
Change	- 2 u	+ 1.2 u
After	3 u	5.2 u

Number of silver coins in percentage
= 100% + 25%
= 125%

125% = ¹²⁵₁₀₀ = ⁵₄

Number of silver coins that Tommy removed
= 40% x 5 u
= ⁴⁰₁₀₀ x 5 u 
= 2 u

Number of green coins that Tommy increased 
= 30% x 4 u
= ³⁰₁₀₀  x 4 u
= 1.2 u

Number of silver coins in the end
= 5 u - 2 u
= 3 u

Number of green coins in the end
= 4 u + 1.2 u
= 5.2 u

Number of fewer silver coins than green coins in the end
= 5.2 u - 3 u 
= 2.2 u 

2.2 u = 132

1 u = 132 ÷ 2.2 = 60

Number of green coins at first
= 4 u
= 4 x 60
= 240

Answer(s): 240