In a shop that sells skirts, 275 blue skirts were sold and 25% of the remaining skirts that were sold were gold. Of the leftover, 40% of the skirts sold were green skirts and the rest were silver skirts. Given that the number of silver skirts sold was 20% of the total number of skirts sold, how many gold and blue skirts were sold altogether?
25% = ²⁵₁₀₀ = ¹₄
40% = ⁴⁰₁₀₀ = ²₅
20% = ²⁰₁₀₀ = ¹₅

Blue	Gold	Green	Silver
275	1x5	3x5
		2x3	3x3
4x9			1x9
25 u	5 u	6 u	9 u

The total number of green and silver shirts is the combined repeated identity. Make the total number of green and silver shirts the same. LCM of 3 and 5 is 15.

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

Number of blue skirts
= 36 u - 5 u - 6 u
= 25 u

25 u = 275

1 u = 275 ÷ 25 = 11

Number of gold and blue skirts
= 5 u + 275
= (5 x 11) + 275
= 55 + 275
= 330

Answer(s): 330