There are 25% more brown beads than gold beads in a bag. After Zane removed 40% of the brown beads and increased the number of gold beads by 30%, there are now 264 fewer brown beads than gold beads. Find the number of gold beads at first.

	Brown	Gold
Before	5 u	4 u
Change	- 2 u	+ 1.2 u
After	3 u	5.2 u

Number of brown beads in percentage
= 100% + 25%
= 125%

125% = ¹²⁵₁₀₀ = ⁵₄

Number of brown beads that Zane removed
= 40% x 5 u
= ⁴⁰₁₀₀ x 5 u 
= 2 u

Number of gold beads that Zane increased 
= 30% x 4 u
= ³⁰₁₀₀  x 4 u
= 1.2 u

Number of brown beads in the end
= 5 u - 2 u
= 3 u

Number of gold beads in the end
= 4 u + 1.2 u
= 5.2 u

Number of fewer brown beads than gold beads in the end
= 5.2 u - 3 u 
= 2.2 u 

2.2 u = 264

1 u = 264 ÷ 2.2 = 120

Number of gold beads at first
= 4 u
= 4 x 120
= 480

Answer(s): 480