In a container, there are chocolate bars of 3 colours, pink, red and brown. There are 360 less brown chocolate bars than red chocolate bars. The number of brown chocolate bars is ¹₂ more than the pink chocolate bars. Given that the number of brown chocolate bars is 15% of the total number of chocolate bars in the container, how many less pink chocolate bars are there than red chocolate bars?

Pink chocolate bars	Red chocolate bars	Brown chocolate bars
	1 u + 360	1 u
2x5		3x5
85%		15%
10%	75%	15%

1 + ¹₂ = ²₂ + ¹₂ = ³₂

Yellow chocolate bars : Purple chocolate bars = 2 : 3

The number of brown chocolate bars is repeated.  Make the number of brown chocolate bars the same.

3 x 5 = 15%

Total number of pink chocolate bars and red chocolate bars in percent
= 100% - 15%
= 85%

Number of red chocolate bars in percent
= 85% - 10%
= 75%

Number of more red chocolate bars than brown chocolate bars in percent
= 75% - 10%
= 60%

60% = 360

1% = 360 ÷ 60 = 6

Number of less pink chocolate bars than red chocolate bars
= 75% - 10%
= 65%
= 65 x 6
= 390

Answer(s): 390