In a container, there are chocolate bars of 3 colours, grey, white and brown. There are 440 less brown chocolate bars than white chocolate bars. The number of brown chocolate bars is ¹₂ more than the grey chocolate bars. Given that the number of brown chocolate bars is 21% of the total number of chocolate bars in the container, how many less grey chocolate bars are there than white chocolate bars?

Grey chocolate bars	White chocolate bars	Brown chocolate bars
	1 u + 440	1 u
2x7		3x7
79%		21%
14%	65%	21%

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 7 = 21%

Total number of grey chocolate bars and white chocolate bars in percent
= 100% - 21%
= 79%

Number of white chocolate bars in percent
= 79% - 14%
= 65%

Number of more white chocolate bars than brown chocolate bars in percent
= 65% - 14%
= 44%

44% = 440

1% = 440 ÷ 44 = 10

Number of less grey chocolate bars than white chocolate bars
= 65% - 14%
= 51%
= 51 x 10
= 510

Answer(s): 510