In a shop that sells dresses, 240 black dresses were sold and 10% of the remaining dresses that were sold were pink. Of the leftover, 50% of the dresses sold were silver dresses and the rest were brown dresses. Given that the number of brown dresses sold was 25% of the total number of dresses sold, how many pink and black dresses were sold altogether?
10% = ¹⁰₁₀₀ = ¹₁₀
50% = ⁵⁰₁₀₀ = ¹₂
25% = ²⁵₁₀₀ = ¹₄

Black	Pink	Silver	Brown
240	1x2	9x2
		1x9	1x9
3x9			1x9
16 u	2 u	9 u	9 u

The total number of silver and brown shirts is the combined repeated identity. Make the total number of silver and brown shirts the same. LCM of 9 and 2 is 18.

The number of brown shirts is repeated. Make the number of brown shirts the same. LCM of 9 and 1 is 9.

Number of black dresses
= 27 u - 2 u - 9 u
= 16 u

16 u = 240

1 u = 240 ÷ 16 = 15

Number of pink and black dresses
= 2 u + 240
= (2 x 15) + 240
= 30 + 240
= 270

Answer(s): 270