In a box, there are sweets of 3 colours, white, green and grey. There are 308 less grey sweets than green sweets. The number of grey sweets is ¹₂ more than the white sweets. Given that the number of grey sweets is 21% of the total number of sweets in the box, how many less white sweets are there than green sweets?

White sweets	Green sweets	Grey sweets
	1 u + 308	1 u
2x7		3x7
79%		21%
14%	65%	21%

1 + ¹₂ = ²₂ + ¹₂ = ³₂

Yellow sweets : Purple sweets = 2 : 3

The number of grey sweets is repeated.  Make the number of grey sweets the same.

3 x 7 = 21%

Total number of white sweets and green sweets in percent
= 100% - 21%
= 79%

Number of green sweets in percent
= 79% - 14%
= 65%

Number of more green sweets than grey sweets in percent
= 65% - 14%
= 44%

44% = 308

1% = 308 ÷ 44 = 7

Number of less white sweets than green sweets
= 65% - 14%
= 51%
= 51 x 7
= 357

Answer(s): 357