In a shop that sells windbreakers, 140 yellow windbreakers were sold and 50% of the remaining windbreakers that were sold were blue. Of the leftover, 40% of the windbreakers sold were pink windbreakers and the rest were brown windbreakers. Given that the number of brown windbreakers sold was 10% of the total number of windbreakers sold, how many blue and yellow windbreakers were sold altogether?
50% = ⁵⁰₁₀₀ = ¹₂
40% = ⁴⁰₁₀₀ = ²₅
10% = ¹⁰₁₀₀ = ¹₁₀

Yellow	Blue	Pink	Brown
140	1x5	1x5
		2x1	3x1
9x3			1x3
20 u	5 u	2 u	3 u

The total number of pink and brown shirts is the combined repeated identity. Make the total number of pink and brown shirts the same. LCM of 1 and 5 is 5.

The number of brown shirts is repeated. Make the number of brown shirts the same. LCM of 3 and 1 is 3.

Number of yellow windbreakers
= 27 u - 5 u - 2 u
= 20 u

20 u = 140

1 u = 140 ÷ 20 = 7

Number of blue and yellow windbreakers
= 5 u + 140
= (5 x 7) + 140
= 35 + 140
= 175

Answer(s): 175