In a box, there are sweets of 3 colours, red, green and silver. There are 480 less silver sweets than green sweets. The number of silver sweets is ¹₂ more than the red sweets. Given that the number of silver sweets is 15% of the total number of sweets in the box, how many less red sweets are there than green sweets?

Red sweets	Green sweets	Silver sweets
	1 u + 480	1 u
2x5		3x5
85%		15%
10%	75%	15%

1 + ¹₂ = ²₂ + ¹₂ = ³₂

Yellow sweets : Purple sweets = 2 : 3

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

3 x 5 = 15%

Total number of red sweets and green sweets in percent
= 100% - 15%
= 85%

Number of green sweets in percent
= 85% - 10%
= 75%

Number of more green sweets than silver sweets in percent
= 75% - 10%
= 60%

60% = 480

1% = 480 ÷ 60 = 8

Number of less red sweets than green sweets
= 75% - 10%
= 65%
= 65 x 8
= 520

Answer(s): 520